Perhaps you should try some spelling variations:
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)
levels decrease » levels increase (Expand search), leaves decrease (Expand search), levels increased (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
waste levels » waste level (Expand search), rate levels (Expand search), waste lees (Expand search)
python based » action based (Expand search)
based python » based path (Expand search), and python (Expand search), gate python (Expand search)

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

• Removing quotes may allow a broader search: (( waste levels decrease decrease processes ) OR ( python based python python programming ))~.