Perhaps you should try some spelling variations:
ban thanh » ban hang
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
bao suc » bao luc, cao suc, bao thuc
ma hoi » mai hoi, xa hoi, me hoi
ve bao » te bao, va bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ((ma hoi) or (ma hoa)). hieu ve bao suc ((ban thanh) or (ban hanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (ma hoa)). hieu ve bao suc ((ban thanh) OR (ban hanh)) dai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ma hoi) or (ma hoa)). hieu ve bao suc ((ban thanh) or (ban hanh)) dai cua triet*.