Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
cong quang » luong quang, thong quang, duong quang
thong dung » thong cong, thong thuong
toc chieu » toc thieu, doc hieu, hoc thieu
dung lap » dung lam, dung lai, dung lao
lap dan » lap dat, lap ban, hap dan
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc chieu sang - thanh ((cong quang) or (thong quan)) thong dung lap dan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu sang - thanh ((cong quang) OR (thong quan)) thong dung lap dan van.
• Adding a wildcard symbol may retrieve word variants: toc chieu sang - thanh ((cong quang) or (thong quan)) thong dung lap dan van*.