Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hanh doanh » hang doanh, chinh doanh, doanh doanh
hieu lang » hieu quang, nhieu tang, hieu van
doanh cua » doanh luan
cua bang » chua bang, cua ban, cua dang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

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 sang) OR (hieu lang)) - hanh doanh cua bang ((cong tan) OR (cong san)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (hieu lang)) - hanh doanh cua bang ((cong tan) or (cong san)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (hieu lang)) - hanh doanh cua bang ((cong tan) or (cong san)) toan ban*.