Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » tong cong, thong thong, phong chong
hoc thieu » toc thieu, hoc hien
dan thanh » dang thanh, danh thanh, ban thanh
thanh bac » nhanh bac, thanh bai, thanh san
tuong va » truong va, thuong va, luong va

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 va ((thong cong) or (trong cong)) dan thanh bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tuong va ((thong cong) OR (trong cong)) dan thanh bac*.