Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » trong cong, tong cong, thong thong
trong thi » trong thoi, trong thu, trong tho
trong mot » trong moi, trong trot, trong hoat
cong dan » cong san, cong tan, huong dan
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - thanh ((trong thi) or (trong mot)) thong cong dan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - thanh ((trong thi) OR (trong mot)) thong cong dan khan cap.
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thanh ((trong thi) or (trong mot)) thong cong dan khan cap*.