Perhaps you should try some spelling variations:
cnhieu tang » chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
quang qua » quang cua, quang tuan, quang xuan
trong dan » trong dang, trong san, trong tan
qua dung » quang dung, su dung, qua song
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((nhieu tang) or (cnhieu tang)) - tinh quang qua dung trong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((nhieu tang) OR (cnhieu tang)) - tinh quang qua dung trong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: doc ((nhieu tang) or (cnhieu tang)) - tinh quang qua dung trong dan toan ban*.