Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
cua nhung » va nhung
hieu van » hieu va, thien van, lieu va
cong dan » cong san, cong tan, cong dong
toan cao » toan ban, toan tap

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: ho ((hieu lang) OR (hieu van)) - van doanh cua nhung ((cong dan) OR (huong dan)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (hieu van)) - van doanh cua nhung ((cong dan) OR (huong dan)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (hieu van)) - van doanh cua nhung ((cong dan) OR (huong dan)) toan cao*.