Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
cua thuong » cua truong, cua phuong, ca thuong
cua thong » cua khong, cua tong, suat thong
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan

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: theo chieu tinh - doanh doanh ((cua thong) OR (cua thuong)) cong ((tac toan) OR (tap toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tinh - doanh doanh ((cua thong) or (cua thuong)) cong ((tac toan) OR (tap toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - doanh doanh ((cua thong) or (cua thuong)) cong ((tac toan) OR (tap toan)) cau*.