Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
thieu sang » chieu sang, thieu khang, thieu quang
cong thang » cong thanh, cang thang, cong thong
hoc thieu » toc thieu, hoc hien
tuong cua » truong cua, huong cua, thong cua
cong lang » cong vang, cong luong, cong quang

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 tuong cua ban ((cong lang) or (cong thang)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tuong cua ban ((cong lang) OR (cong thang)) van ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh tuong cua ban ((cong lang) or (cong thang)) van ban*.