Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
canh doanh » chinh doanh, doanh doanh, kinh doanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
dan toan » van toan, dan than, manh toan

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 doanh) or (hanh doanh)) luan dang cong ((dan toan) or (dan ca)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - ((canh doanh) OR (hanh doanh)) luan dang cong ((dan toan) OR (dan ca)) cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((canh doanh) or (hanh doanh)) luan dang cong ((dan toan) or (dan ca)) cau*.