Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh dong » anh dong, ha dong
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
anh dang » anh dong, anh dung, anh bang
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
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 dong) or (anh dang)) luan hung cong san ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quang - ((hanh dong) OR (anh dang)) luan hung cong san ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu quang - ((hanh dong) or (anh dang)) luan hung cong san ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - ((hanh dong) or (anh dang)) luan hung cong san ((toan cau) OR (toan cao))*.