Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc va » thuc vat, thuc dan, thuc day
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
van cam » van nam, van lam, van cau
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
xuc va » duc va, tuc va, luc va
ve va » ve van, te va, le va
ke va » te va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ky tang xa hoi. hieu van cam ((xuc va) or (thuc va)) danh ((ve va) OR (ke va)) trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky tang xa hoi. hieu van cam ((xuc va) OR (thuc va)) danh ((ve va) OR (ke va)) trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ky tang xa hoi. hieu van cam ((xuc va) or (thuc va)) danh ((ve va) OR (ke va)) trien".
• Adding a wildcard symbol may retrieve word variants: te san ky tang xa hoi. hieu van cam ((xuc va) or (thuc va)) danh ((ve va) OR (ke va)) trien*.