Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
quan dung » quang dung, quan duong, quan dong
trong tac » trong cac, tuong tac, trong tan
tran chau » tranh chap, tran huu
qua dung » quang dung, su dung, qua song
tran cau » toan cau, ran cau, tra cau

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: doi chieu xanh - thanh trung ((quan dung) OR (qua dung)) trong tac ((tran cau) OR (tran chau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh trung ((quan dung) OR (qua dung)) trong tac ((tran cau) or (tran chau))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh trung ((quan dung) OR (qua dung)) trong tac ((tran cau) or (tran chau))*.