Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu cua » hieu qua, dieu cua, bieu cua
thuc day » thuc dan, thuc vat
day danh » day manh, dai danh, dao danh
danh vai » danh sai, danh va, doanh van
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
vai cua » dai cua, hai cua, lai cua
co hoi » co hoc
cua am » cua tam, cua nam, cua dam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang ((co hoi) OR (co loi)). hieu cua am thuc day danh vai cua triet~.
• Adding a wildcard symbol may retrieve word variants: te sach tu nang ((co hoi) or (co loi)). hieu cua am thuc day danh vai cua triet*.