Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
khang cong » hang cong, thanh cong, dang cong
hoc thieu » toc thieu, hoc hien
thanh hai » thanh phan, thanh hoa, thanh san
van khang » van khanh, van thanh, van quang
dan toan » van toan, dan than, manh toan
hai van » thai van, ha van, hai tan
van tan » van tuan, van ban, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - thanh hai van khang cong ((dan toan) or (van tan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh hai van khang cong ((dan toan) OR (van tan)) cao*.