Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh ban » doanh bat, doanh van, doanh nhan
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
nang xa » nang ma, mang xa, ang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
ban cua » ban quan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((((nang xa) OR (nang x))) OR (lang xa)) hoi. hieu va cac duc va doanh ban cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((((nang xa) OR (nang x))) or (lang xa)) hoi. hieu va cac duc va doanh ban cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((((nang xa) OR (nang x))) or (lang xa)) hoi. hieu va cac duc va doanh ban cua triet*.