Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh dung » thanh duong, thanh tung, hanh dung
thanh hung » thanh huong, thanh tung, thanh trung
thong cong » trong cong, thong thong, phong chong
hoc thieu » toc thieu, hoc hien
tong cong » trong cong, cong cong, dung cong
dan chan » dan gian, dan ca, van chat
chan ban » can ban, chat ban, chan nan

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 dung) OR (thanh hung)) cua ((thong cong) or (tong cong)) dan chan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((thanh dung) OR (thanh hung)) cua ((thong cong) OR (tong cong)) dan chan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((thanh dung) OR (thanh hung)) cua ((thong cong) or (tong cong)) dan chan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((thanh dung) OR (thanh hung)) cua ((thong cong) or (tong cong)) dan chan ban*.