Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
cau tre » cau tren, cau treo, cau tra
tu can » tu ban, thu canh
tuc va » thuc va, truc va, tuc xa
di cau » da cau, diem cau

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) OR (tu cac)) ky tang xa hoi. ((hieu van) or (hieu va)) cam tuc va thanh di cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu can) OR (tu cac)) ky tang xa hoi. ((hieu van) OR (hieu va)) cam tuc va thanh di cau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu can) OR (tu cac)) ky tang xa hoi. ((hieu van) or (hieu va)) cam tuc va thanh di cau tre".
• Adding a wildcard symbol may retrieve word variants: ((tu can) OR (tu cac)) ky tang xa hoi. ((hieu van) or (hieu va)) cam tuc va thanh di cau tre*.