Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
tong huong » thong huong, tong thuong, cong huong
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
manh toan » thanh toan, anh tuan, tinh toan
cua tong » cua cong, cua dong, cua nong
dan toan » van toan, dan than, xuan toan
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - doanh doanh cua tong huong ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - doanh doanh cua tong huong ((dan toan) OR (manh toan)) cau*.