Perhaps you should try some spelling variations:
their programming » their reprogramming (Expand search), theory programming (Expand search), the programming (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
coding vpython » modeling vpython (Expand search), codigo python (Expand search)
vpython python » python python (Expand search), pythons python (Expand search), piton python (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), ratio decrease (Expand search), rate increase (Expand search)
python coding » action coding (Expand search), python code (Expand search)

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

• Removing quotes may allow a broader search: (( decrease rate decrease their programming ) OR ( python coding vpython python programming ))~.