Perhaps you should try some spelling variations:
coc thuc » hoc thuc, doc thuc, co thuc
cau theo » cau thi
cau treo » cau tren, cau triet, cau trieu
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
ve coc » ve cuoc, ve cac, ve co
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 ve coc thuc va thanh vi ((cau treo) or (((cau theo) OR (cau tao))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. hieu ve coc thuc va thanh vi ((cau treo) OR (((cau theo) OR (cau tao)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x hoi. hieu ve coc thuc va thanh vi ((cau treo) or (((cau theo) OR (cau tao))))".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. hieu ve coc thuc va thanh vi ((cau treo) or (((cau theo) OR (cau tao))))*.