Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
ve nam » he nam, va nam, le nam
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty hang xa hoi. hieu ve nam thuc va danh ((vai cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty hang xa hoi. hieu ve nam thuc va danh ((vai cua) OR (de cua)) tre*.