Perhaps you should try some spelling variations:
decrease processes » disease processes (Expand search), defense processes (Expand search), decay processes (Expand search)
diseases decrease » diseases decreases (Expand search), disease decreases (Expand search), diseases disease (Expand search)
decrease plant » decreases plant (Expand search), increase plant (Expand search), decrease and (Expand search)
python c » python _ (Expand search)
c pitons » _ pitons (Expand search), s litons (Expand search), c picos (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 plant diseases decrease processes ) OR ( python c pitons python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease plant diseases decrease processes ) OR ( python c pitons python programming ))*.