Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
canh doanh » hanh doanh, chinh doanh, doanh doanh
hieu lang » chieu sang, nhieu tang, hieu van
doanh cua » doanh luan
cua nhung » va nhung
cong danh » cuong danh, cong thanh, cong khanh
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (hieu quang)) - canh doanh cua nhung ((cong danh) or (cong dan)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (hieu quang)) - canh doanh cua nhung ((cong danh) OR (cong dan)) phan tu.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (hieu quang)) - canh doanh cua nhung ((cong danh) or (cong dan)) phan tu*.