Perhaps you should try some spelling variations:
decrease operational » increase operational (Expand search), disease operational (Expand search), decrease cooperation (Expand search)
operational process » operational processes (Expand search), operacional processos (Expand search), operational problems (Expand search)
decrease lesions » disease lesions (Expand search), decreased response (Expand search), decrease adhesion (Expand search)
lesions decrease » response decrease (Expand search), lesions case (Expand search)
and decreased » and decreases (Expand search), and increased (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (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 lesions decrease operational process ) OR ( decrease OR decrease AND decreased ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease lesions decrease operational process ) OR ( decrease OR decrease and decreased ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease lesions decrease operational process ) OR ( decrease OR decrease and decreased ))*.