Perhaps you should try some spelling variations:
thanh quang » nhanh quang, thanh quan, than quang
quang luong » quang cuong, quang vuong, quang phuong
nhieu tang » chieu sang, nhiet nang
thanh tung » thanh cong
tung thanh » trung thanh, tang thanh, dung thanh
hieu lang » chieu sang, hieu quang, hieu van
luong va » dung va
toan cau » toan cao, toan ban, toan tap
va toan » van toan, bai toan, tap toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((nhieu tang) OR (hieu lang)) - thanh tung thanh quang luong va toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((nhieu tang) OR (hieu lang)) - thanh tung thanh quang luong va toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((nhieu tang) OR (hieu lang)) - thanh tung thanh quang luong va toan cau*.