Perhaps you should try some spelling variations:
diffraction stable » diffraction state (Expand search), diffraction studies (Expand search), diffraction problem (Expand search)
decrease processes » disease processes (Expand search), defense processes (Expand search), decay processes (Expand search)
decrease decrease » decrease release (Expand search), disease decreases (Expand search), decrease sucrose (Expand search)
stable python » stable paths (Expand search), stable method (Expand search), simple python (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
an decrease » and decrease (Expand search), can decrease (Expand search), any decrease (Expand search)
code an » code and (Expand search)

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

• Removing quotes may allow a broader search: (( code an decrease decrease processes ) OR ( diffraction stable python python programming ))~.