Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doc sach » toc sach, nuoc sach, dac sac
hoc sach » hoc sinh, hoc cac, hoc anh
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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: ((doc sach) OR (hoc sach)) y nang ((xa hoi) OR (cac khoan)). hieu va cam luc va hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (hoc sach)) y nang ((xa hoi) or (cac khoan)). hieu va cam luc va hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) OR (hoc sach)) y nang ((xa hoi) or (cac khoan)). hieu va cam luc va hanh vi cua triet*.