Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
mai khoa » tai khoa, may khoa, dai khoa
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
ve cac » va cac, vien cac
vu san » va san, vu ban
san ky » sang ky, van ky, dan ky
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu san ky nang ((((ma hoi) or (mai khoa))) or (ma hoa)). hieu ve cac nuoc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky nang ((((ma hoi) OR (mai khoa))) OR (ma hoa)). hieu ve cac nuoc va thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu san ky nang ((((ma hoi) or (mai khoa))) or (ma hoa)). hieu ve cac nuoc va thanh vi cua tre*.