Perhaps you should try some spelling variations:
van trien » van tien, va trien, van tren
ky tang » ky dang, kho tang, ky trong
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
danh ve » dinh ve, hanh ve, anh ve
te sac » te sach, te cac, te san
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
ve van » le van

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ((ky tang) or (ky nang)) xa hoi. hieu va cam ((xuc va) or (thuc va)) danh ve van trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky tang) OR (ky nang)) xa hoi. hieu va cam ((xuc va) OR (thuc va)) danh ve van trien.
• Adding a wildcard symbol may retrieve word variants: te sac ((ky tang) or (ky nang)) xa hoi. hieu va cam ((xuc va) or (thuc va)) danh ve van trien*.