Perhaps you should try some spelling variations:
phap duc » pham duc, phan duc, phap doc
hieu ban » hieu van, dieu ban, lieu ban
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi cau » va cau, ve cau, di cau
5 hoi » o hoi

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: ((tu sach) OR (su sach)) ky nang ((5 hoi) OR (x ho)). hieu ban phap duc va danh vi cau treo~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ((5 hoi) or (x ho)). hieu ban phap duc va danh vi cau treo*.