Perhaps you should try some spelling variations:
lieu van » hieu van, sieu van, lieu nano
hanh tai » thanh tai, hang tai, han tai
sach dao » lanh dao
nam thuc » nam thuoc, am thuc, nam thu
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
sach lo » sach doi, sach hoi, sach moi
nang ma » tang ma, sang ma, nang cao
tai hoa » tai khoa, thai hoa, thi hoa
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 dao)) nang ma hoi. ((lieu van) or (lieu va)) nam thuc va hanh tai hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach lo) OR (sach dao)) nang ma hoi. ((lieu van) OR (lieu va)) nam thuc va hanh tai hoa viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach lo) or (sach dao)) nang ma hoi. ((lieu van) or (lieu va)) nam thuc va hanh tai hoa viet*.