Perhaps you should try some spelling variations:
nam duoc » nam thuoc, da duoc, dat duoc
dinh tri » chinh tri
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
duoc ma » duoc lam
ma dinh » mai dinh, va dinh, ba dinh
cua tre » cua te, cuu tre, cua triet
te sai » te tai, te bai, te lai
sai ky » sac ky
va nam » van nam, ha nam, va nay

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky ((nang cao) or (tang ma)) hoi. hieu va nam duoc ma dinh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky ((nang cao) OR (tang ma)) hoi. hieu va nam duoc ma dinh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: te sai ky ((nang cao) or (tang ma)) hoi. hieu va nam duoc ma dinh tri cua tre*.