i  KHOA  ----------       MSSV : 506401085   2010 ii  em        cho em  Em   ho em S h d nhi t v v v c trong th gian l vi,   vi v gi em v qua nhi kh kh               n Ha,    p cho  Cu c, em xin g l ch s kho, h ph v th c t to th qu th, qu c tr  h K thu c ngh Tp H ch minh v Ban L , c b  nghi  Nh m Ha ch Bi ha.  112    iii         iv     ---------   : MSSV : 506401085  : : 06VQT1 1.   .  .  . 2.   .  . 3.     .     .   4.   .  .  . 5.   .  .  .  .    v     ---------   .  .  .  .  .    .     .    .  .  .  .  .  .  .    ThS.  vi         1  . 3  . 3  . 4 .   . 6  . 6  . 6  7  10  10  11  . 9  . 10  10  . 14  17 Thc trn tr nguc ca N 2.1 Gii thiu tng quan v NM HCBH . 20  20 vii  . 21  . 22  . 22  . 23  25  . 26  27  33 2.2.4  35 2 . 37  . 37  . 44 2.3.2.1 T 45  45  49  . 51  51 2.3.4.2  . 54  54 2.3.4.4 P . . 55    . 59  . 60     . 61  . 61  61     viii  62  64  . . 65  . 68    . 70   . 70  72  ix  - 2009 25  2009 . 27  12  . 15  . 21   . 22  31  2009 26  2009 . 26 x   . 34  . 18  34  . 34  . 18  29  . 17 TP. TCHC  . 25  32  . 25  . 26  . 18  32  . 25  . 27  - 13