Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
danh vai » danh sai, danh va, doanh van
dan danh » van danh, han danh, ban danh
thuc dan » thuc hanh, hoc dan, thuc vat
cam thuc » am thuc, nam thuc, cam thu
lai hoi » dai hoi, lai hoa, lai roi
sanh va » hanh va, anh va, sinh va
van cam » van nam, van lam, van cau
mai doi » moi doi, mai hoi, mai khoi
va nang » van nang, da nang, cam nang
vai cua » dai cua, hai cua, lai cua
so sanh » do sanh

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh va nang ((mai doi) OR (lai hoi)). hieu van cam thuc dan danh vai cua viet~.
• Adding a wildcard symbol may retrieve word variants: so sanh va nang ((mai doi) or (lai hoi)). hieu van cam thuc dan danh vai cua viet*.