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)
decreased speed » decreased sleep (Expand search), decreased sperm (Expand search), decreased need (Expand search)
speed decrease » stent decrease (Expand search)
method python » method method (Expand search), python python (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decreased speed decrease decrease processes ) OR ( python _ method python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased speed decrease decrease processes ) OR ( python _ method python programming ))*.