Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
cong thanh » dong thanh, cong trinh, truong thanh
hoc thieu » toc thieu, hoc hien
cac dang » cao dang, cac dan, cac cong
cap bang » cao bang, can bang, lap bang
cong tan » cong tac, cong san, cong ty

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - thanh trung ((cac dang) or (cap bang)) ((cong tan) OR (cong thanh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh trung ((cac dang) OR (cap bang)) ((cong tan) OR (cong thanh)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh trung ((cac dang) or (cap bang)) ((cong tan) OR (cong thanh)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh trung ((cac dang) or (cap bang)) ((cong tan) OR (cong thanh)) van ban*.