Perhaps you should try some spelling variations:
phap duc » pham duc, phan duc, phap doc
cau treo » cau theo, cau tren, cau triet
te sach » toc sach
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va phap » va phat, ban phap
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi cau » va cau, ve cau, di cau
o hoi » co hoi, o hoc, o hai

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: ((te sach) OR (su sach)) ky nang ((o hoi) OR (x ho)). hieu va phap duc va danh vi cau treo~.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (su sach)) ky nang ((o hoi) or (x ho)). hieu va phap duc va danh vi cau treo*.