Perhaps you should try some spelling variations:
thanh hac » thanh hai, thanh bac, thanh cac
nang van » dang van, tang van, lang van
thanh ha » thanh hoa, thanh hai, nhanh ha
cuu tre » cua tre, cau tren, cau treo
van hoe » van hoa, van hoc, van hieu
hieu ve » hieu va, hieu van
cac toc » cac toi, cac nuoc, cac thoi
cac tac » cac bac, cac dac, cac tai
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky nang van hoe. hieu ve ((cac toc) or (cac tac)) va ((thanh ha) or (thanh hac)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang van hoe. hieu ve ((cac toc) OR (cac tac)) va ((thanh ha) OR (thanh hac)) cuu tre*.