Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cai hoi » dai hoi, cai hoa, lai hoi
cau luc » cau truc, cau phuc
va cau » van cau, va cac, va dau

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 ((cai hoi) or (cau hoi)). hieu va cau luc ((ban hanh) or (va danh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((cai hoi) OR (cau hoi)). hieu va cau luc ((ban hanh) OR (va danh)) vai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((cai hoi) or (cau hoi)). hieu va cau luc ((ban hanh) or (va danh)) vai cua triet*.