Perhaps you should try some spelling variations:
rats decreases » and decreases (Expand search), but decreases (Expand search), stress decreases (Expand search)
decrease rigid » decrease lipid (Expand search), decrease risk (Expand search), decrease covid (Expand search)
decrease rats » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rigid object » rigid objects (Expand search), rights object (Expand search), field object (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 rats decreases _ decrease ) OR ( decrease in decrease rigid object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease rats decreases _ decrease ) OR ( decrease in decrease rigid object ))*.