Perhaps you should try some spelling variations:
reward processing » word processing (Expand search), onboard processing (Expand search), and processing (Expand search)
decrease reward » decrease awkward (Expand search), decrease towards (Expand search), increase rewards (Expand search)
cross decreased » causes decreased (Expand search), corn decreased (Expand search), loss decrease (Expand search)
decrease cross » decrease costs (Expand search), increase cross (Expand search), decrease sucrose (Expand search)
decreased to » decreased the (Expand search), decreased tgf (Expand search), decreased in (Expand search)
decrease at » decrease akt (Expand search), decrease and (Expand search), decrease in (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), and decrease (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 at decrease reward processing ) OR ( decrease cross decreased to decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease at decrease reward processing ) OR ( decrease cross decreased to decrease ))*.