Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hung thanh » nhung thanh, phung thanh, hung thang
hieu lang » chieu sang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
ung hung » dung hung, ung nhung, ung dung
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
cua ung » cua rung, cua ong, cua nhung

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu quang)) - canh tranh cua ung hung thanh ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (hieu quang)) - canh tranh cua ung hung thanh ((toan cau) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (hieu quang)) - canh tranh cua ung hung thanh ((toan cau) OR (toan tap))*.