Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
thanh lap » thanh san, phan lap, thanh hai
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » huong dan, cong dong, cong tac
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac

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 thong ((((cong dan) OR (cong tan))) or (cong san)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - canh tranh cua thong ((((cong dan) OR (cong tan))) OR (cong san)) thanh lap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - canh tranh cua thong ((((cong dan) OR (cong tan))) or (cong san)) thanh lap*".