Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
dung luong » dung thuong, dung phuong, dung truong
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
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) OR (hieu lang)) - nhan sinh va dung luong quang ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhieu tang) OR (hieu lang)) - nhan sinh va dung luong quang ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((nhieu tang) OR (hieu lang)) - nhan sinh va dung luong quang ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) OR (hieu lang)) - nhan sinh va dung luong quang ((toan cau) or (toan cao))*.