Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
cay phoi » cap phoi, tay hoi, cay cho
cau phuc » cau truc, chau phu, huu phuc
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, gay thoi
sach ky » sac ky, sach y, sach ty
cau luc » cau truc
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach

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: su sach ky dang ((xay hoi) OR (cay phoi)). hieu qua ((cau luc) OR (cau phuc)) va hanh vi van triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang ((xay hoi) OR (cay phoi)). hieu qua ((cau luc) or (cau phuc)) va hanh vi van triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang ((xay hoi) OR (cay phoi)). hieu qua ((cau luc) or (cau phuc)) va hanh vi van triet*.