Perhaps you should try some spelling variations:
extraction method » extraction methods (Expand search)
basic extraction » based extraction (Expand search), classic extraction (Expand search), based extractions (Expand search)
power functions » power function (Expand search), motor functions (Expand search), taper functions (Expand search)
functions basic » functions based (Expand search), functional basis (Expand search), functions brazil (Expand search)
codigo pythons » codigo python (Expand search), codigos python (Expand search)
pythons python » python python (Expand search), pitons python (Expand search), piton 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 basic extraction method ) OR ( using codigo pythons python programming ))~.