Perhaps you should try some spelling variations:
decrease retrieval » decrease striatal (Expand search), dense retrieval (Expand search), database retrieval (Expand search)
retrieval process » retrieval models (Expand search), removal process (Expand search)
walking decreases » training decreases (Expand search), leaching decreases (Expand search), taping decrease (Expand search)
decrease walking » increase walking (Expand search), decreases weaning (Expand search), decrease during (Expand search)
decreases with » increases with (Expand search), decreases in (Expand search)
with decrease » with decreased (Expand search), with deceased (Expand search), with increase (Expand search)
decrease at » decrease and (Expand search), decrease in (Expand search), decrease of (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), and decrease (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 at decrease retrieval process ) OR ( decrease walking decreases with decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease at decrease retrieval process ) OR ( decrease walking decreases with decrease ))*.