Perhaps you should try some spelling variations:
ban thanh » ban hanh
thu sach » tu sach, thuat sach, thuoc sach
ban hang » ngan hang
cau treo » cau theo, cau tren, cau triet
hieu va » lieu va, hieu qua
dao duc » giao duc, tao duoc
y nang » ky nang, ly nang, v nang
va dao » ca dao
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu va dao duc ((ban thanh) OR (ban hang)) hai ((cau treo) OR (cau tao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu va dao duc ((ban thanh) OR (ban hang)) hai ((cau treo) or (cau tao))~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu va dao duc ((ban thanh) OR (ban hang)) hai ((cau treo) or (cau tao))*.