Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
ca tren » cau tren, cu tren, la tren
hieu va » lieu va
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
can ky » van ky, dan ky, ban ky
luc va » duc va, tuc va
loc va » hoc va
tu can » tu ban, tu cac, thu canh
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 can ky tang xa hoi. ((hieu va) or (hieu qua)) cam ((luc va) or (loc va)) thanh vi ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky tang xa hoi. ((hieu va) OR (hieu qua)) cam ((luc va) OR (loc va)) thanh vi ca tren.
• Adding a wildcard symbol may retrieve word variants: tu can ky tang xa hoi. ((hieu va) or (hieu qua)) cam ((luc va) or (loc va)) thanh vi ca tren*.