Perhaps you should try some spelling variations:
lexical processing » chemical processing (Expand search), textual processing (Expand search), optical processing (Expand search)
decrease lesions » disease lesions (Expand search), decreased response (Expand search), decrease adhesion (Expand search)
lesions case » lesion case (Expand search), lesions caused (Expand search), lesions based (Expand search)
case lexical » base lexical (Expand search), scale lexical (Expand search), mawe lexical (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( decrease lesions case lexical processing ) OR ( decrease NOT decrease and decrease ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease lesions case lexical processing ) OR ( decrease NOT decrease AND decrease ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease lesions case lexical processing ) OR ( decrease NOT decrease and decrease ))*".