Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hieu quang » thieu quang, hieu qua, diep quang
hieu quan » hieu qua, lieu quan, thien quan
tranh cua » doanh cua, manh cua
dung cong » dung trong
hoa phan » hoa dan, co phan
phan cau » phan dau, phan cac, phan tu

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

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