Perhaps you should try some spelling variations:
vpython collisions » vpython colisoes (Expand search), proton collisions (Expand search), photon collisions (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)
collisions lt » collisions at (Expand search), collisions put (Expand search), collisions ats (Expand search)
decrease may » decrease at (Expand search), decrease by (Expand search), decrease human (Expand search)
may decrease » may increase (Expand search), can decrease (Expand search), to decrease (Expand search)
lt python » lib python (Expand search), _ python (Expand search), in python (Expand search)

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

• Removing quotes may allow a broader search: (( decrease may decrease decrease processes ) OR ( vpython collisions lt python programming ))~.