Perhaps you should try some spelling variations:
sach nham » sach nha, sach tham, sach han
nham nang » phap nang, cam nang, kha nang
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, am thuc, nam thuc
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
van lam » van nam
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
di cua » dai cua, doi cua, de 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 nham nang xa hoi. hieu van lam thuc va hanh ((di cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach nham nang xa hoi. hieu van lam thuc va hanh ((di cua) OR (vai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: so sach nham nang xa hoi. hieu van lam thuc va hanh ((di cua) or (vai cua)) triet*.