Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
truong va » truong dai, truong cao, truong dao
va thong » va thuong, va phuong, he thong
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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 truong va thong cong ((dan than) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh truong va thong cong ((dan than) OR (van than)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh truong va thong cong ((dan than) or (van than)) cau*.