Perhaps you should try some spelling variations:
extration method » extraction method (Expand search), extraction methods (Expand search), titration method (Expand search)
power functions » power function (Expand search), motor functions (Expand search), taper functions (Expand search)
functions used » functions based (Expand search), functions using (Expand search), functions under (Expand search)
used extration » based extraction (Expand search), seed extraction (Expand search), mspd extraction (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: (( power functions used extration method ) OR ( using coding python python programming ))~.