Perhaps you should try some spelling variations:
decrease spatial » decrease survival (Expand search), decrease striatal (Expand search), decrease asian (Expand search)
decrease strain » increase strain (Expand search), decreases pain (Expand search), decreased brain (Expand search)
strain decrease » stress decreases (Expand search)
spatial effect » spatial effects (Expand search), spatial neglect (Expand search), spatial extent (Expand search)
decrease hiv » decrease their (Expand search), decreased high (Expand search), decrease with (Expand search)
hiv decrease » via decrease (Expand search), hiv increase (Expand search), will decrease (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain 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 strain decrease hiv decrease ) OR ( decrease in decrease spatial effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease strain decrease hiv decrease ) OR ( decrease in decrease spatial effect ))*.