Perhaps you should try some spelling variations:
lam thuc » lam thuoc, am thuc, nam thuc
tay lang » tai lang, tay tang, tay quang
hieu van » hieu va, thien van, lieu va
co sach » bo sach, cuon sach, hoc sach
danh du » danh dau, danh tu, dinh du
danh vi » hanh vi, dinh vi, danh di
thuc va » thuc vat, thuc dan, thuc day
van lam » van nam
ty lang » ty xang, ty hang, tu lang
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: co sach ((ty lang) OR (tay lang)) xa hoi. hieu van lam thuc va ((danh vi) or (danh du)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ty lang) OR (tay lang)) xa hoi. hieu van lam thuc va ((danh vi) OR (danh du)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((ty lang) OR (tay lang)) xa hoi. hieu van lam thuc va ((danh vi) or (danh du)) cua tre*".