Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu lang » cu lang, tu lanh, xu lang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
dinh te » kinh te, dich te, dinh ve
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ve nam » he nam, va nam, le nam

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 tu lang xa hoi. hieu ve nam thuc va dinh te ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu lang xa hoi. hieu ve nam thuc va dinh te ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach tu lang xa hoi. hieu ve nam thuc va dinh te ((cua tre) or (cuu tre))*.