Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
te sach » toc sach
dau cua » day cua, cau cua, dan cua
thuc va » thuc vat, thuc dan, thuc day
ve nham » ve nha, ve cham
hieu ve » hieu va, hieu van
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
co hoi » co hoc, co loi
va dan » ca dan, va dao, va dau

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 ((y nang) or (ly nang)) co hoi. hieu ve nham thuc va dan ((dau cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) co hoi. hieu ve nham thuc va dan ((dau cua) OR (dai cua)) te.
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ly nang)) co hoi. hieu ve nham thuc va dan ((dau cua) or (dai cua)) te*.