Perhaps you should try some spelling variations:
optimization program » optimization problem (Expand search), optimization programming (Expand search), optimization problems (Expand search)
route optimization » the optimization (Expand search), shape optimization (Expand search)
decrease processes » disease processes (Expand search), defense processes (Expand search), decay processes (Expand search)
decrease decrease » decrease release (Expand search), disease decreases (Expand search), decrease sucrose (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and decrease (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 NOT decrease decrease processes ) OR ( python AND route optimization program ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease not decrease decrease processes ) OR ( python AND route optimization program ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease not decrease decrease processes ) OR ( python AND route optimization program ))*.