Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
cau treo » cau theo, cau tren, cau triet
thanh vi » hanh vi, thanh va, thanh ve
thuc day » thuc dan, thuc vat
tu sach » thu sach, su sach, te sach
ve cac » va cac, vien cac
sach v » sach va, sach y, sach 2
ve coc » ve cuoc, 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) or (ve cac)) thuc day thanh vi ((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 ((ve coc) OR (ve cac)) thuc day thanh vi ((cau treo) OR (cau thi)).
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. hieu ((ve coc) or (ve cac)) thuc day thanh vi ((cau treo) or (cau thi))*.