Perhaps you should try some spelling variations:
doanh toan » doanh hoan, doanh doanh, doanh thanh
hieu lang » chieu sang, hieu quang, nhieu tang
cua thang » cua hang, cua thanh, cua thuong
xua thang » xuan thang, xuan thanh, xuan trang
tran manh » tran minh, tran thanh, tran van
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac

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: hoc hieu lang - doanh toan ((cua thang) OR (xua thang)) ((cong dan) OR (cong san)) tran manh~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - doanh toan ((cua thang) or (xua thang)) ((cong dan) or (cong san)) tran manh*.