Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va
ca tren » cau tren, cu tren, la tren
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
loc va » hoc va, luc va
vi ca » vit ca, li ca, va ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky tang xa hoi. ((hieu va) or (hieu qua)) cam ((duc va) or (loc va)) thanh vi ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky tang xa hoi. ((hieu va) OR (hieu qua)) cam ((duc va) OR (loc va)) thanh vi ca tren.
• Adding a wildcard symbol may retrieve word variants: tu san ky tang xa hoi. ((hieu va) or (hieu qua)) cam ((duc va) or (loc va)) thanh vi ca tren*.