Perhaps you should try some spelling variations:
brain decreases » bail decreases (Expand search), niacin decreases (Expand search), brain diseases (Expand search)
decrease brain » decreased brain (Expand search), decreases brain (Expand search), decreases brown (Expand search)
decrease focal » decreases local (Expand search), decrease fetal (Expand search), decrease total (Expand search)
decreases can » decreases pecan (Expand search), decreases pain (Expand search), decreases in (Expand search)
focal objects » social objects (Expand search), local object (Expand search), real objects (Expand search)
can decrease » can increase (Expand search), and decrease (Expand search), to decrease (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (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 brain decreases can decrease ) OR ( decrease NOT decrease focal objects ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease brain decreases can decrease ) OR ( decrease not decrease focal objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease brain decreases can decrease ) OR ( decrease not decrease focal objects ))*.