Perhaps you should try some spelling variations:
perception progress » perception press (Expand search), selection progress (Expand search), reaction progress (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)
method perception » emotion perception (Expand search), method description (Expand search), food perception (Expand search)
python mixed » python based (Expand search), ration mixed (Expand search), proton mixed (Expand search)
mixed method » mixed methods (Expand search), based method (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (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: "(( decrease to decrease decrease processes ) OR ( python mixed method perception progress ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease to decrease decrease processes ) OR ( python mixed method perception progress ))*.