Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
tang qua » tang quan, tang cua, tang quy
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 chieu xanh - hanh tang qua song ((cong tan) OR (cong thanh)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh tang qua song ((cong tan) OR (cong thanh)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh tang qua song ((cong tan) OR (cong thanh)) van ban*.