Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
van anh » van thanh, tuan anh, van minh
va dau » va dao

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

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