Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
theo chieu » theo tieu, ho chieu, theo chu
hanh tang » hanh trang, anh tang, hanh mang
thi hieu » thi chieu, thi hien, thi dieu
tang cua » mang cua, hang cua, tang luan
cua hang » cua dang, cua nhung, cua cong
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: ((theo chieu) or (thi hieu)) xanh - hanh tang cua hang ((cong tan) OR (cong thanh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (thi hieu)) xanh - hanh tang cua hang ((cong tan) OR (cong thanh)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (thi hieu)) xanh - hanh tang cua hang ((cong tan) OR (cong thanh)) van ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (thi hieu)) xanh - hanh tang cua hang ((cong tan) OR (cong thanh)) van ban*.