Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
dinh vai » dinh van, dinh vi, dinh va
cam thuc » am thuc, nam thuc, cam thu
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau
so sach » so sanh, bo sach, co sach
mai doi » moi doi, mai khoi, mai duoc
mai hoi » mai khoi, dai hoi, mai hoa
lai hoi » dai hoi, lai hoa, lai roi
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach v nang ((((mai doi) or (mai hoi))) or (lai hoi)). hieu van cam thuc va dinh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang ((((mai doi) OR (mai hoi))) OR (lai hoi)). hieu van cam thuc va dinh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: so sach v nang ((((mai doi) or (mai hoi))) or (lai hoi)). hieu van cam thuc va dinh vai cua viet*.