Perhaps you should try some spelling variations:
hoang van » hang va
hanh vai » hanh vi, hanh va, hanh tai
cua tre » cua te, cuu tre, cua triet
cac toc » cac toi, cac nuoc, cac thoi
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
cac lop » cac hop, cac loai
va hanh » van hanh, va thanh, va danh
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ky ((nang xa) or (hoang van)) hoi. hieu ve ((cac lop) or (cac toc)) va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky ((nang xa) OR (hoang van)) hoi. hieu ve ((cac lop) OR (cac toc)) va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te san ky ((nang xa) or (hoang van)) hoi. hieu ve ((cac lop) or (cac toc)) va hanh vai cua tre*.