Perhaps you should try some spelling variations:
cong quang » luong quang, thong quang, duong quang
nhieu tang » chieu sang, hieu lang, nhiet nang
dung cong » dung trong
ho nhieu » hop nhieu, ho chieu, he nhieu
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
sinh va » sinh vat, tinh va, dinh van
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho nhieu tang - nhan sinh va dung cong quang ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho nhieu tang - nhan sinh va dung cong quang ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho nhieu tang - nhan sinh va dung cong quang ((toan cau) or (toan cao))*.