Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
te sach » toc sach
ly nang » ky nang, ly hang, ly vang
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
ve nham » ve nha, ve cham
thuc va » thuc vat, thuc dan, thuc day
dau cua » day cua, cau cua, dan cua
y nang » ky nang, v nang, may nang
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)) cao 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)) cao hoi. hieu ve nham thuc va dan ((dau cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ly nang)) cao 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)) cao hoi. hieu ve nham thuc va dan ((dau cua) or (dai cua)) te*.