Perhaps you should try some spelling variations:
modeling vpython » modeling method (Expand search)
code complexity » case complexity (Expand search), care complexity (Expand search), the complexity (Expand search)
control problem » control problems (Expand search), control program (Expand search)
using modeling » using model (Expand search), using modern (Expand search), using models (Expand search)
vpython python » python python (Expand search), pythons python (Expand search), piton python (Expand search)
coder code » code code (Expand search), modern code (Expand search), color code (Expand search)

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

• Removing quotes may allow a broader search: (( coder code complexity control problem ) OR ( using modeling vpython python programming ))~.