Perhaps you should try some spelling variations:
pain decreases » pain decrease (Expand search), brain decreases (Expand search), pten decreases (Expand search)
decrease pain » decreases pain (Expand search), decrease in (Expand search), decreased brain (Expand search)
the processor » the professor (Expand search), the processo (Expand search), the professors (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), and decrease (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 pain decreases the processor ) OR ( decrease to decrease rate decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease pain decreases the processor ) OR ( decrease to decrease rate decrease ))*.