Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
cong thanh » dong thanh, cong trinh, truong thanh
hieu lang » chieu sang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
cua phan » cua nhan, cua phap, cua han
cong tan » cong tac, cong san, cong ty
doan cau » toan cau, doan dau, doan cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) or (hieu quang)) - canh tranh cua phan ((cong tan) OR (cong thanh)) doan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (hieu quang)) - canh tranh cua phan ((cong tan) OR (cong thanh)) doan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho ((hieu lang) or (hieu quang)) - canh tranh cua phan ((cong tan) OR (cong thanh)) doan cau".
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) or (hieu quang)) - canh tranh cua phan ((cong tan) OR (cong thanh)) doan cau*.