Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
te sach » toc sach
ty nong » ty dong, may nong, duy nong
tu nong » tu dong, tu cong, tu tong
hieu ha » hieu hoa, hieu va, hieu ca
thuc va » thuc vat, thuc dan, thuc day
danh du » danh dau, danh tu, dinh du
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nong) OR (tu nong)) xa hoi. hieu ha nam thuc va ((danh du) OR (hanh vi)) cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nong) OR (tu nong)) xa hoi. hieu ha nam thuc va ((danh du) or (hanh vi)) cua tu~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nong) OR (tu nong)) xa hoi. hieu ha nam thuc va ((danh du) or (hanh vi)) cua tu*.