Perhaps you should try some spelling variations:
cuc triet » cua triet, su triet, cac trieu
hanh dong » anh dong, ha dong
thu sach » tu sach, thuat sach, thuoc sach
dong cuc » dong luc, dong cua, tong cuc
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
co loi » co hoi
va hoc » van hoc
nuoc » quoc, duoc, ngoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach v nang ((cao hoi) or (co loi)). hieu va hoc nuoc va hanh dong cuc triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach v nang ((cao hoi) OR (co loi)). hieu va hoc nuoc va hanh dong cuc triet.
• Adding a wildcard symbol may retrieve word variants: thu sach v nang ((cao hoi) or (co loi)). hieu va hoc nuoc va hanh dong cuc triet*.