Perhaps you should try some spelling variations:
varational python » variational method (Expand search), varational methods (Expand search), variational path (Expand search)
based programming » and programming (Expand search), based program (Expand search), cone programming (Expand search)
codigos python » codigo python (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
code codigos » code codigo (Expand search), caconde codigos (Expand search), sobre codigos (Expand search)
python based » action based (Expand search)

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

• Removing quotes may allow a broader search: (( code codigos python based programming ) OR ( python varational python python programming ))~.