Perhaps you should try some spelling variations:
decrease spiral » decrease survival (Expand search), decrease striatal (Expand search), decrease visceral (Expand search)
spiral pattern » spiral patterns (Expand search), spectral pattern (Expand search), spatial pattern (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can increase » an increase (Expand search), and increase (Expand search), an increased (Expand search)
decrease or » decrease of (Expand search), decrease pro (Expand search), decrease toc (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), to decrease (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease and (Expand search)
on decrease » on decreased (Expand search), of decrease (Expand search), and decrease (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease OR decrease can increase ) OR ( decrease on decrease spiral pattern ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease or decrease can increase ) OR ( decrease on decrease spiral pattern ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease or decrease can increase ) OR ( decrease on decrease spiral pattern ))*.