Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
tang cua » mang cua, hang cua, tang luan
cong san » cong tac
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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 - hanh ((doanh cua) or (tang cua)) hang cong san ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quang - hanh ((doanh cua) OR (tang cua)) hang cong san ((toan cao) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - hanh ((doanh cua) or (tang cua)) hang cong san ((toan cao) or (van ban))*.