Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
lieu van » hieu van, sieu van, lieu nano
hanh dai » hanh tai, hanh dao, vanh dai
nam thuc » nam thuoc, am thuc, nam thu
sach doi » sach hoi, sach moi, sach dao
nang ma » tang ma, sang ma, nang cao
sach lo » sach dao, sach hoi, sach moi
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach lo) OR (sach doi)) nang ma hoi. ((lieu van) or (lieu va)) nam thuc va hanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach lo) OR (sach doi)) nang ma hoi. ((lieu van) OR (lieu va)) nam thuc va hanh dai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach lo) OR (sach doi)) nang ma hoi. ((lieu van) or (lieu va)) nam thuc va hanh dai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach lo) OR (sach doi)) nang ma hoi. ((lieu van) or (lieu va)) nam thuc va hanh dai cua viet*.