Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chong dung » thong dung, cuong dung, cong dung
dung quang » dang quang, dung quan, luong quang
quang than » quang thanh, quang thang, quang tuan
trong cap » trong cac, trong ca, thong cap
trung cap » truong cao, trung tam
ho chieu » theo chieu, hoc thieu, mot chieu
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - thanh ((trong cap) or (trung cap)) chong dung quang than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh ((trong cap) OR (trung cap)) chong dung quang than cap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh ((trong cap) or (trung cap)) chong dung quang than cap*.