Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, diep quang
hanh doanh » hang doanh, chinh doanh, doanh doanh
khong cong » thong cong, khong cang, khong con
chong cong » cong cong, thong cong, cuong cong
doanh cua » doanh luan
van chat » cao chat
chat cau » chat cam, chat cao, chat va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu quang) or (hieu qua)) - hanh doanh cua ((khong cong) OR (chong cong)) van chat cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu quang) OR (hieu qua)) - hanh doanh cua ((khong cong) OR (chong cong)) van chat cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu quang) or (hieu qua)) - hanh doanh cua ((khong cong) OR (chong cong)) van chat cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu quang) or (hieu qua)) - hanh doanh cua ((khong cong) OR (chong cong)) van chat cau*.