Perhaps you should try some spelling variations:
optimum processing » optimum pressing (Expand search), minimum processing (Expand search), optical processing (Expand search)
decrease optimum » discrete optimum (Expand search), decrease sodium (Expand search), reverse optimum (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)

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 NOT decrease optimum processing ) OR ( decrease lesions decrease OR decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease NOT decrease optimum processing ) OR ( decrease lesions decrease OR decrease ))*.