Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
quan dung » quang dung, quan duong, quan dong
qua dung » quang dung, su dung, qua song
lan toan » dan toan, lap toan, manh toan
van toan » van tuan, van tan, van thanh

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 - hanh trinh ((quan dung) OR (qua dung)) phuong ((lan toan) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh trinh ((quan dung) or (qua dung)) phuong ((lan toan) OR (van toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh trinh ((quan dung) or (qua dung)) phuong ((lan toan) OR (van toan)) cau*.