Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, am thuc, nam thuc
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nano » truc nano
nano xa » nano va, nano bac, nano cau
van lam » van nam
thuc va » thuc vat, thuc dan, thuc day
danh vi » hanh vi, dinh vi, danh va
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tu nano xa hoi. hieu van lam thuc va ((danh vi) or (danh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nano xa hoi. hieu van lam thuc va ((danh vi) OR (danh di)) cua tre*.