Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
anh quang » anh xquang, anh quan, nhanh quang
tran hung » tran hong, tran hoang, tran huu
cuong tac » cong tac, tuong tac, cuong cac
tac quang » thac quang, tac quan, tai quang
quang cao » nang cao, quang nam

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 - anh quang ((tran hung) or (tran quang)) cuong tac quang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - anh quang ((tran hung) OR (tran quang)) cuong tac quang cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - anh quang ((tran hung) or (tran quang)) cuong tac quang cao*.