Perhaps you should try some spelling variations:
ban thanh » ban hanh
va triet » va thiet, va trien, ve triet
ban hang » ngan hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, te sach, tu cach
cam duc » cam xuc, cao duc, pham duc
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ky nang xa hoi. hieu van cam duc ((ban thanh) or (ban hang)) vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu van cam duc ((ban thanh) OR (ban hang)) vai va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. hieu van cam duc ((ban thanh) or (ban hang)) vai va triet*.