Perhaps you should try some spelling variations:
functional classes » functional class (Expand search), functional changes (Expand search), functional analyses (Expand search)
classes extraction » closes extraction (Expand search), classic extraction (Expand search), clay extraction (Expand search)
extraction method » extraction methods (Expand search)
coder functional » modern functional (Expand search), border functional (Expand search), order functional (Expand search)
codigos pitons » codigos python (Expand search)
using codigos » usando codigos (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: (( coder functional classes extraction method ) OR ( using codigos pitons python programming ))~.