Perhaps you should try some spelling variations:
decrease lesions » disease lesions (Expand search), decreased response (Expand search), decrease adhesion (Expand search)
lesions decrease » response decrease (Expand search), lesions case (Expand search)
increase rigid » increase risk (Expand search), increase rice (Expand search), increase bird (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not increase » and increase (Expand search), an increase (Expand search)
rigid object » rigid objects (Expand search), rights object (Expand search), field object (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 AND decrease lesions decrease ) OR ( decrease NOT increase rigid object ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease AND decrease lesions decrease ) OR ( decrease not increase rigid object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease AND decrease lesions decrease ) OR ( decrease not increase rigid object ))*.