... boat ciia loai ngdn ngff van van trong dan gian. 32 Tap chi Nghien cffu va Phat trien, sd 4 (69). 2008 -I- Co mdt the dang dang chu y trong Idi do la the dang gdm ba ddng, hai ddng dau ... tac theo cac the hdn hgp khac: - "Trai mac ao, Lao d tran; Lao manh nhff than, Trai yeu gp ep" (mang va tre) (Dang ket hgp: 3-3 - 4-4 ) - "Thang nhd nhd, Mae ao dd, Dgi bui ... vffffn" (qua dffa) (Dang ke't hgp: 3-3 - 3-5 ) - "Tren da, dffdi da, Giffa cd con ca thdn ban" (rang va lffdi) (Dang ke't hgp: 4-6 , van trac) - "Cha cao, me cao,...