Perhaps you should try some spelling variations:
extractions method » extraction method (Expand search), extraction methods (Expand search), extration method (Expand search)
case extractions » case extraction (Expand search), phase extractions (Expand search), based extractions (Expand search)
power functions » power function (Expand search), motor functions (Expand search), taper functions (Expand search)
functions case » functions are (Expand search), functions and (Expand search), functions at (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
using codigo » using indigo (Expand search), using coding (Expand search), using codium (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 extractions method ) OR ( using codigo python python programming ))~.