Perhaps you should try some spelling variations:
ban thanh » ban hanh
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu van cam duc ((ban thanh) or (ban hang)) hai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu van cam duc ((ban thanh) OR (ban hang)) hai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu van cam duc ((ban thanh) or (ban hang)) hai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu van cam duc ((ban thanh) or (ban hang)) hai ((cua tre) OR (cua triet))*.