Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
tam thuc » tham thuc, am thuc, nam thuc
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, tao hoi
cao hoc » co hoc, cho hoc, chat hoc
va hanh » van hanh, va thanh, va danh
va tam » van tam, va tham, va tac
vi cua » vai cua, di cua

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 ky nang ((cao hoi) OR (cao hoc)). lieu va tam thuc ((va hanh) or (gia thanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((cao hoi) OR (cao hoc)). lieu va tam thuc ((va hanh) OR (gia thanh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((cao hoi) OR (cao hoc)). lieu va tam thuc ((va hanh) or (gia thanh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((cao hoi) OR (cao hoc)). lieu va tam thuc ((va hanh) or (gia thanh)) vi cua triet*.