Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
trung cao » truong cao, trung cap, trung co
ho chieu » theo chieu, hoc thieu, doi chieu
cao cong » cac cong, cao dang, cua cong
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh

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 - thanh trung cao cong ((cong tap) or (cong tan)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - thanh trung cao cong ((cong tap) OR (cong tan)) van ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh trung cao cong ((cong tap) or (cong tan)) van ban*.