Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, diep quang
quoc hang » quoc thang, quoc hung, quoc hanh
hang cong » dang cong, hang nong, bang cong
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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 qua)) - thanh trung quoc hang cong san ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (hieu qua)) - thanh trung quoc hang cong san ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (hieu qua)) - thanh trung quoc hang cong san ((toan cau) or (toan cao))*.