Perhaps you should try some spelling variations:
diffraction problem » diffusion problem (Expand search), bifurcation problem (Expand search), interaction problem (Expand search)
memory diffraction » temporal diffraction (Expand search), memory dysfunction (Expand search), memory disruption (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
coder memory » poder memory (Expand search), codes memory (Expand search), border memory (Expand search)
coder coder » coder decoder (Expand search), code code (Expand search), decoder codec (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 coder memory diffraction problem ) OR ( in python python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder coder memory diffraction problem ) OR ( in python python python programming ))*.