Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
canh manh » lanh manh, canh tranh, cach mang
tong cong » trong cong, cong cong, dung cong
dan thanh » dang thanh, danh thanh, ban thanh
doc hieu » toc thieu, hoc thieu, hoc hien
manh cua » doanh cua, ban cua
cua tong » cua cong, cua dong, cua nong
dan hanh » dang hanh, dan khanh, ban hanh

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 manh cua tong cong ((dan hanh) or (dan thanh)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - canh manh cua tong cong ((dan hanh) OR (dan thanh)) cac*.