Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
va pham » van pham, va phat, va phap
duc van » duc va, duc tan, duc manh
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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) or (su sach)) ky nang o hoi. lieu va pham duc van hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang o hoi. lieu va pham duc van hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang o hoi. lieu va pham duc van hanh dai cua triet*.