Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
nam thuc » nam thuoc, am thuc, nam thu
hieu ve » hieu va, hieu van
cao hoi » cau hoi, cao hoc, tao hoi
hai cau » hai chau, hai hau, hoi cau
hai chu » hai chau, hoi chu, hai chi
su sach » so sach, vu sach
ve nam » he nam, va nam, le nam
y nang » ky nang, ly nang, v nang
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 nam thuc 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 nam thuc 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 nam thuc van hanh ((hai cau) or (hai chu)) treo*.