Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
ca tren » cau tren, cu tren, la tren
va cam » va cham, va cac, va cao
tuc va » truc va, tuc xa, duc va
vi ca » vit ca, li ca, va ca

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 cac ky nang ((ma hoa) OR (mai hoi)). hieu va cam ((tuc va) OR (thuc va)) thanh vi ca tren~.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((ma hoa) or (mai hoi)). hieu va cam ((tuc va) or (thuc va)) thanh vi ca tren*.