Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van thai » van thoai, van tai, van hai
thai son » thai den, thai do, thai hoc
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, de cac
te cao » te bao
son va » song va, son la, lon va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cac) or (te cao)) ky tang xa hoi. hieu van thai son va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (te cao)) ky tang xa hoi. hieu van thai son va thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (te cao)) ky tang xa hoi. hieu van thai son va thanh vi cua tre*.