Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
nam truc » nam truoc, nam trung, nam thuoc
anh mai » anh bai, anh mau, anh ma
sach va » sach xa, sach ha, sach dao
so sach » so sanh, bo sach, co sach
va nang » van nang, da nang, cam nang
hieu ve » hieu va, hieu van
ma hoi » mai hoi, ma hoa, 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: so sach va nang ((ma hoi) or (xa hoi)). hieu ve ((nam truc) or (nam thuc)) tuan anh mai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach va nang ((ma hoi) OR (xa hoi)). hieu ve ((nam truc) OR (nam thuc)) tuan anh mai va triet.
• Adding a wildcard symbol may retrieve word variants: so sach va nang ((ma hoi) or (xa hoi)). hieu ve ((nam truc) or (nam thuc)) tuan anh mai va triet*.