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