Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
cong thanh » dong thanh, cong trinh, truong thanh
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
cua hang » cua dang, cua nhung, cua cong
cong tan » cong tac, cong san, cong ty
doan ban » doanh ban, toan ban, doan van

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 ((chieu sang) OR (hieu lang)) - canh tranh cua hang ((cong tan) OR (cong thanh)) doan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - canh tranh cua hang ((cong tan) OR (cong thanh)) doan ban~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - canh tranh cua hang ((cong tan) OR (cong thanh)) doan ban*.