Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
danh vai » danh sai, danh va, doanh van
day danh » day manh, dai danh, dao danh
thuc day » thuc dan, thuc vat
cam thuc » am thuc, nam thuc, cam thu
sanh van » san van, anh van, canh van
hieu van » thien van, lieu va, hieu ve
van nang » van quang, van ban, van dong
lai hoi » dai hoi, lai hoa, lai roi
hieu va » lieu va, hieu qua
mai doi » moi doi, mai hoi, mai khoi
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.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh van nang ((mai doi) or (lai hoi)). ((hieu van) OR (hieu va)) cam thuc day danh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh van nang ((mai doi) OR (lai hoi)). ((hieu van) OR (hieu va)) cam thuc day danh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh van nang ((mai doi) or (lai hoi)). ((hieu van) OR (hieu va)) cam thuc day danh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: so sanh van nang ((mai doi) or (lai hoi)). ((hieu van) OR (hieu va)) cam thuc day danh vai cua viet*.