Perhaps you should try some spelling variations:
vpython programming » python programming (Expand search), method programming (Expand search), creation programming (Expand search)
defense processes » defense process (Expand search), decrease processes (Expand search), disease processes (Expand search)
decrease defense » defense defense (Expand search), decrease release (Expand search), decreases disease (Expand search)
python script » python scrum (Expand search)
model vpython » modeling vpython (Expand search), modulo python (Expand search)
script model » script poex (Expand search), descriptor model (Expand search)
decrease at » decrease and (Expand search), decrease in (Expand search), decrease of (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.

• Removing quotes may allow a broader search: (( decrease at decrease defense processes ) OR ( python script model vpython programming ))~.