Perhaps you should try some spelling variations:
optical processing » spatial processing (Expand search), lexical processing (Expand search), chemical processing (Expand search)
decrease optical » decrease physical (Expand search), decrease fetal (Expand search), decrease total (Expand search)
costs decrease » loss decrease (Expand search), not decrease (Expand search), cells decrease (Expand search)
disease costs » disease cost (Expand search), disease cross (Expand search), disease cases (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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( disease costs decrease optical processing ) OR ( decrease AND decrease AND decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( disease costs decrease optical processing ) OR ( decrease and decrease AND decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( disease costs decrease optical processing ) OR ( decrease and decrease AND decrease ))*.