Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
cua nhung » va nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - ((canh tranh) or (hanh trinh)) cua nhung ((cong dan) OR (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - ((canh tranh) OR (hanh trinh)) cua nhung ((cong dan) OR (cong san)) toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - ((canh tranh) or (hanh trinh)) cua nhung ((cong dan) OR (cong san)) toan cao*".