Perhaps you should try some spelling variations:
increase feathering » increase neighboring (Expand search)
feathering effect » rescattering effect (Expand search), scattering effects (Expand search), heating effect (Expand search)
decrease pain » decreases pain (Expand search), decrease in (Expand search), decreased brain (Expand search)
pain decrease » can decrease (Expand search), taping decrease (Expand search), brain decreases (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and increase » and increases (Expand search), and increased (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 pain decrease ) OR ( decrease AND increase feathering effect ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease OR decrease pain decrease ) OR ( decrease and increase feathering effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease OR decrease pain decrease ) OR ( decrease and increase feathering effect ))*.