Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh cong » thanh cong, hang cong, hanh dong
thu sach » tu sach, thuat sach, thuoc sach
cu triet » cau triet, su triet, tu triet
cao hoi » cau hoi, co hoi, cao hoc
qua hoc » cua hoc, quang hoc, qua hoat
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
co loi » co hoi
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 y nang ((cao hoi) or (co loi)). hieu qua hoc nuoc va hanh cong ((cu triet) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((cao hoi) OR (co loi)). hieu qua hoc nuoc va hanh cong ((cu triet) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((cao hoi) or (co loi)). hieu qua hoc nuoc va hanh cong ((cu triet) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((cao hoi) or (co loi)). hieu qua hoc nuoc va hanh cong ((cu triet) OR (cua triet))*.