Perhaps you should try some spelling variations:
extractions method » extraction method (Expand search), extraction methods (Expand search), extration method (Expand search)
used extractions » based extractions (Expand search), based extraction (Expand search), seed extraction (Expand search)
taper functions » transfer functions (Expand search), linear functions (Expand search)
functions used » functions based (Expand search), functions using (Expand search), functions under (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: (( taper functions used extractions method ) OR ( using codigo python python programming ))~.