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
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
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) OR (lang 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) OR (lang xa)) hoi. lieu va dau tu ((van anh) OR (ban hanh)) dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tu ((nang xa) OR (lang 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) OR (lang xa)) hoi. lieu va dau tu ((van anh) or (ban hanh)) dai cua triet*.