Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » hanh chinh
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
doi chieu » doc hieu, doi chi, ho chieu
cua thong » cua thuong, cua khong, cua tong
toan ban » van ban

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 - ((hanh trinh) or (canh tranh)) cua thong ((cong thanh) OR (dong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - ((hanh trinh) OR (canh tranh)) cua thong ((cong thanh) OR (dong thanh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - ((hanh trinh) or (canh tranh)) cua thong ((cong thanh) OR (dong thanh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((hanh trinh) or (canh tranh)) cua thong ((cong thanh) OR (dong thanh)) toan ban*.