Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cong tacg » cong tang, cong thang, cong tan
doc hieu » toc thieu, hoc thieu, hoc hien
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
hanh cat » hanh cac, hanh luat, nhanh cay

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 tacg) or (cong tac)) hanh cat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - canh tranh cua dong ((cong tacg) OR (cong tac)) hanh cat*.