Perhaps you should try some spelling variations:
coc thuc » hoc thuc, doc thuc, co thuc
cau treo » cau theo, cau tren, cau triet
thanh ve » hanh ve, thanh va, thanh vien
thanh vi » hanh vi, thanh va, nhanh vi
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
sach v » sach va, sach y, sach 2
va coc » va cuoc, va cac, va hoc
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach v nang x hoi. hieu va coc thuc va ((thanh vi) OR (thanh ve)) ((cau treo) or (cau thi))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. hieu va coc thuc va ((thanh vi) OR (thanh ve)) ((cau treo) OR (cau thi)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x hoi. hieu va coc thuc va ((thanh vi) OR (thanh ve)) ((cau treo) or (cau thi))".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. hieu va coc thuc va ((thanh vi) OR (thanh ve)) ((cau treo) or (cau thi))*.