Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quang » thieu quang, hieu quan, hieu qua
thanh toan » thanh hoa, thanh san, tinh toan
toan tan » toan tang, toan tran, toan ban
tan dung » tran dung, tin dung, van dung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
quan tap » quan tai, quan lap, quan tam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu quang)) - thanh toan tan dung ((cong tan) OR (cong tac)) quan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu quang)) - thanh toan tan dung ((cong tan) OR (cong tac)) quan tap~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu quang)) - thanh toan tan dung ((cong tan) OR (cong tac)) quan tap*.