Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
nhung cong » dung cong, thong cong, hang cong
quang toan » quang tuan, quang tran, quang doan
mot chieu » doi chieu, ho chieu
doanh cua » doanh luan
cua nhung » va nhung
vang toan » van toan, dang toan, vang trang
doc hieu » toc thieu, hoc thieu, hoc hien

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: ((mot chieu) OR (doc hieu)) sang - doanh doanh cua nhung cong ((vang toan) OR (quang toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (doc hieu)) sang - doanh doanh cua nhung cong ((vang toan) OR (quang toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (doc hieu)) sang - doanh doanh cua nhung cong ((vang toan) OR (quang toan)) cao*.