Perhaps you should try some spelling variations:
propagation algorithm » approximation algorithm (Expand search), approximation algorithms (Expand search)
coder propagation » mode propagation (Expand search), model propagation (Expand search), modes propagation (Expand search)
using coping » using coding (Expand search), using coupling (Expand search), nursing coping (Expand search)
coping in » coping _ (Expand search)
in python » _ python (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( coder propagation algorithm optimization AND ) OR ( using coping in python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder propagation algorithm optimization AND ) OR ( using coping in python programming ))*.