Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hai cuc » hai cua, thai cua, hai huoc
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang xay hoi. hieu qua ((hai cuc) OR (tai cuc)) va hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xay hoi. hieu qua ((hai cuc) OR (tai cuc)) va hanh vi cua triet*.