. ehfl Han cua ngudi Viet Nam bay khdng. b. Cd su khae nhau trong phuong phap bgc ehfl Han gifla cac hgc sinb thude cac nam (nam thfl 1, nam thfl 2, nam tbfl 3 va nam thfl 4) hay khdng Nam thfl 1 41 (9.9%) 20(5%) 47(11.3%) 17(4%) 125 (30%) Nam thfl 2 30(7.2%) 22(5.3%) 46(11.1%) 19(4.6%) 117(28%) Nam thfl 3 22(5.3%) 18(4.3%) 25(6%) 17(4%) 82(19.&%) Nam. cua chu Han qua hinh dang Nam 1 2.74# 3.39# 2.32# 2.60@ 2.97@ 2.15 Nam 2 2.51 3.05 2.05 2.96 3.21 2.21 Nam 3 2.26 3.17 2.02 2.86 3.16 2.58 Nam 4 2.32 3.08 1.94@ 3.12