Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, pham duy, phan duc
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu nang xa hoi. hieu ve ((cham duc) or (cham soc)) ((ban hanh) or (van hanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. hieu ve ((cham duc) OR (cham soc)) ((ban hanh) OR (van hanh)) dai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. hieu ve ((cham duc) or (cham soc)) ((ban hanh) or (van hanh)) dai cua triet*.