Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
chiet tach » chieu sach
trung vien » truong vien, trung kien, trung viet
cong khanh » cong thanh, cong khan, cong nhan
vien tong » vien thong, vien dong, vien truong
cong hach » cong sach, cong thanh, trong hach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chiet tach)) - thanh trung vien tong ((cong hach) OR (cong khanh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chiet tach)) - thanh trung vien tong ((cong hach) OR (cong khanh)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chiet tach)) - thanh trung vien tong ((cong hach) OR (cong khanh)) van ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chiet tach)) - thanh trung vien tong ((cong hach) OR (cong khanh)) van ban*.