Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
quang dung » quang trung, ung dung, cuong dung
quan dung » quan duong, qua dung, quan dong
san thanh » ban thanh, van thanh, son thanh
thanh cac » hanh cac, thanh bac, thanh ca
cong san » cong tac

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) or (hieu quang)) - thanh tung ((quan dung) or (quang dung)) cong san thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu quang)) - thanh tung ((quan dung) OR (quang dung)) cong san thanh cac.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu quang)) - thanh tung ((quan dung) or (quang dung)) cong san thanh cac*.