Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
dong cong » duong cong, dung cong, cong cong
dang cong » dung cong
thanh cha » thanh ha, thanh nha, thanh phan
doc hieu » toc thieu, hoc thieu, hoc hien
thanh ca » thanh cac, thanh ha, thanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu manh - canh tranh cua ((dong cong) or (dang cong)) dang ((thanh ca) OR (thanh cha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - canh tranh cua ((dong cong) OR (dang cong)) dang ((thanh ca) OR (thanh cha))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - canh tranh cua ((dong cong) or (dang cong)) dang ((thanh ca) OR (thanh cha))*".