Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van thai » van thoai, van tai, van hai
thai lon » thai long, thai son, thai loi
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
te cac » ve cac, te cao, de cac
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 (tu cac)) ky lang xa hoi. hieu van thai lon va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (tu cac)) ky lang xa hoi. hieu van thai lon va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (tu cac)) ky lang xa hoi. hieu van thai lon va hanh vi cua tre*.