Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
cham duc » pham duc, cham soc, pham duy
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
hieu vu » hieu va, hieu su, dieu vu
tu nang » tru nang, tu nong, tu nano
hieu ve » hieu va, hieu van
x hoi » xa hoi, o hoi, x ho

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 tu nang x hoi. ((hieu vu) or (hieu ve)) cham duc ((van hanh) or (ban hanh)) dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nang x hoi. ((hieu vu) OR (hieu ve)) cham duc ((van hanh) OR (ban hanh)) dai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach tu nang x hoi. ((hieu vu) or (hieu ve)) cham duc ((van hanh) or (ban hanh)) dai cua viet*.