Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
hai chu » hai chau, hoi chu, hai chi
hai cau » hai chau, hai hau, hoi cau
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cao hoi » cau hoi, cao hoc, tao hoi
cam tuc » cam xuc, cam tu, nam thuc
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
co hoi » co hoc, co loi

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 y nang ((cao hoi) or (co hoi)). hieu ve cam tuc van hanh ((hai cau) or (hai chu)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((cao hoi) OR (co hoi)). hieu ve cam tuc van hanh ((hai cau) OR (hai chu)) treo.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((cao hoi) or (co hoi)). hieu ve cam tuc van hanh ((hai cau) or (hai chu)) treo*.