Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
tay hoi » tay ho, tay thai
tao hoi » tao khoi, tao boi, thao hoc
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hanh de, hang di
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham
di cua » dai cua, doi cua, de 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 _ sang ((tay hoi) or (tao hoi)). hieu v pham duc van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach _ sang ((tay hoi) OR (tao hoi)). hieu v pham duc van hanh di cua triet*.