Perhaps you should try some spelling variations:
dua tren » dung tren
va tinh » may tinh
tinh ve » trinh ve, tinh ven, dinh ve
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
cua tre » cuu tre, cua triet, cua thep
tu ban » thu ban, te ban
ban ky » van ky, dan ky
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu
va am » va lam, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky nang ma hoi. hieu va am thuc va tinh ve ((((cua tre) OR (dua tren))) OR (cua te))~.
• Adding a wildcard symbol may retrieve word variants: tu ban ky nang ma hoi. hieu va am thuc va tinh ve ((((cua tre) or (dua tren))) or (cua te))*.