Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
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
hieu van » thien van, lieu va, hieu ve
lai hoi » dai hoi, lai hoa, lai roi
sanh va » hanh va, anh va, sinh va
hieu va » lieu va, hieu qua
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) OR (hieu va)) cam thuc dan danh vai cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh va nang ((mai doi) or (lai hoi)). ((hieu van) OR (hieu va)) 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) OR (hieu va)) cam thuc dan danh vai cua viet*.