Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » vu sach
so sach » so sanh, bo sach, co sach
tu nang » tru nang, tu nong, tu nano
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
x hoi » xa hoi, o hoi, 5 hoi

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 (so sach)) tu nang ((x hoi) or (x ho)). hieu ve cham duc van hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) tu nang ((x hoi) OR (x ho)). hieu ve cham duc van hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) tu nang ((x hoi) or (x ho)). hieu ve cham duc van hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) tu nang ((x hoi) or (x ho)). hieu ve cham duc van hanh dai cua triet*.