Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach dat » sach dao, sach danh, sach bai
dat nang » da nang, dat hang, dai nang
cam thuc » nam thuc, cam thu, can thuc
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
cao hoi » cau hoi, cao hoc, tao hoi
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 dat nang ((cao hoi) or (co hoi)). hieu ve ((cam thuc) or (am thuc)) va thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach dat nang ((cao hoi) OR (co hoi)). hieu ve ((cam thuc) OR (am thuc)) va thanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach dat nang ((cao hoi) or (co hoi)). hieu ve ((cam thuc) or (am thuc)) va thanh vi cua triet*.