Perhaps you should try some spelling variations:
modeling vpython » modeling method (Expand search)
python modeling » motion modeling (Expand search), python coding (Expand search), python morelia (Expand search)
decrease based » decreased base (Expand search), decrease blood (Expand search)
vpython python » python python (Expand search), pythons python (Expand search), piton python (Expand search)
decrease of » decrease in (Expand search)
of decrease » not decrease (Expand search), to decrease (Expand search), of decree (Expand search)

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

• Removing quotes may allow a broader search: (( decrease of decrease based program ) OR ( python modeling vpython python programming ))~.