Perhaps you should try some spelling variations:
thanh trung » thanh tung
trong thanh » truong thanh, trung thanh, rong thanh
chieu sang » chieu sach, chieu xanh, nhieu tang
quang dung » quang trung, ung dung, cuong dung
thanh toan » thanh hoa, thanh san, tinh toan
hieu lang » hieu quang, nhieu tang, hieu van
qua dung » su dung, qua song, qua cong
toan cao » toan ban, toan tap

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 lang)) - thanh trung ((qua dung) OR (quang dung)) trong thanh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - thanh trung ((qua dung) OR (quang dung)) trong thanh toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh trung ((qua dung) OR (quang dung)) trong thanh toan cao*.