Perhaps you should try some spelling variations:
ve triet » va trien, su triet
dang xay » dang van, van xay
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
cam luc » cam xuc
su sach » vu sach
xay hoi » xa hoi, tay hoi, cay phoi
so sach » so sanh, bo sach, co sach
y dang » ky dang, 2 dang, _ dang
vi ve » va ve, gi ve, ve ve

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