Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
cam thuc » am thuc, cam thu, can thuc
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
nang co » nang cao, nang doc, nang noi
va nang » van nang, da nang, cam nang
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
co hoi » co hoc, co loi
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: ((su sach) or (co sach)) va nang co hoi. hieu ve ((cam thuc) or (nam thuc)) va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) va nang co hoi. hieu ve ((cam thuc) OR (nam thuc)) va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) va nang co hoi. hieu ve ((cam thuc) or (nam thuc)) va hanh vi cua triet*.