Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hang
ban hanh » ban hang
thu sach » tu sach, thuat sach, thuoc sach
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
bao suc » bao luc, cao suc, bao thuc
mai hoi » mai khoi, dai hoi, lai hoi
hai cua » thai cua, dai cua, hoi cua
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 ((mai hoi) or (ma hoa)). hieu ve bao suc ((ban thanh) or (ban hanh)) hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((mai hoi) OR (ma hoa)). hieu ve bao suc ((ban thanh) OR (ban hanh)) hai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((mai hoi) or (ma hoa)). hieu ve bao suc ((ban thanh) or (ban hanh)) hai cua triet*.