Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » hanh chinh
phuong lan » phuong la, thuong lan, phuong linh
doi chieu » doc hieu, doi chi, ho chieu
quan dung » quang dung, quan duong, qua dung
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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