Perhaps you should try some spelling variations:
duoc van » duc van, duoc ban, duoc dan
va triet » va thiet, va trien, ve triet
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duoc va » nuoc va, duc va, duoc ma
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
anh vi » hanh vi, anh va, anh ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ma hoi. hieu va cham ((duoc van) or (duoc va)) anh vi ((va triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. hieu va cham ((duoc van) OR (duoc va)) anh vi ((va triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. hieu va cham ((duoc van) or (duoc va)) anh vi ((va triet) or (cua vat))*.