Perhaps you should try some spelling variations:
control programs » control program (Expand search), control problems (Expand search), control problem (Expand search)
time complexity » the complexity (Expand search), regime complexity (Expand search), case complexity (Expand search)
modeling python » modeling vpython (Expand search), modeling pitting (Expand search)
using modeling » using model (Expand search), using modern (Expand search), using models (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
coder time » cover time (Expand search), modern time (Expand search), over time (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( coder time complexity control programs ) OR ( using modeling python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder time complexity control programs ) OR ( using modeling python python programming ))*.