Perhaps you should try some spelling variations:
extraction method » extraction methods (Expand search)
power functions » power function (Expand search), motor functions (Expand search), taper functions (Expand search)
case extraction » cane extraction (Expand search), phase extraction (Expand search), based extraction (Expand search)
functions case » functions are (Expand search), functions and (Expand search), functions at (Expand search)
codigos python » codigo python (Expand search)
using codigos » usando codigos (Expand search), using coding (Expand search), using codium (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)

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

• Removing quotes may allow a broader search: (( power functions case extraction method ) OR ( using codigos python python programming ))~.