Perhaps you should try some spelling variations:
mien trung » tieng trung, viet trung
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, truong thanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
hoc mien » hoc hien, hoc vien, ho mien
cong tan » cong san, cong ty, cong ha
cong tac » 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 mien trung - hanh tranh cua nhung ((((cong tan) OR (cong tac))) or (cong thanh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc mien trung - hanh tranh cua nhung ((((cong tan) OR (cong tac))) OR (cong thanh)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc mien trung - hanh tranh cua nhung ((((cong tan) OR (cong tac))) or (cong thanh)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc mien trung - hanh tranh cua nhung ((((cong tan) OR (cong tac))) or (cong thanh)) van ban*.