Perhaps you should try some spelling variations:
extraction method » extraction methods (Expand search)
taper functions » transfer functions (Expand search), linear functions (Expand search)
are extraction » area extraction (Expand search), ore extraction (Expand search), pre extraction (Expand search)
functions are » functions and (Expand search), functions from (Expand search), functions _ (Expand search)
coding python » codigo python (Expand search), codigos python (Expand search), using python (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
using coding » using coping (Expand search), using coating (Expand search), using cooking (Expand search)

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

• Removing quotes may allow a broader search: (( taper functions are extraction method ) OR ( using coding python python programming ))~.