Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nam thuc » nam thuoc, am thuc, nam thu
moi nang » hoi nang, voi nang, moi dang
hanh doi » thanh doi, hanh noi, hang doi
hieu van » thien van, lieu va, hieu ve
sach moi » sach doi, sach hoi, bach mai
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach moi nang ((ma hoi) or (ma hoa)). ((hieu van) or (hieu va)) nam thuc va hanh doi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach moi nang ((ma hoi) OR (ma hoa)). ((hieu van) OR (hieu va)) nam thuc va hanh doi cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach moi nang ((ma hoi) or (ma hoa)). ((hieu van) or (hieu va)) nam thuc va hanh doi cua viet*.