Talvez deva tentar algumas variações de ortografia:
demographical variables » demographic variables (Expandir a busca), demographics variables (Expandir a busca), geographical variables (Expandir a busca)
python demographical » python graphical (Expandir a busca), payment demographical (Expandir a busca), socio demographical (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
coder python » codigo python (Expandir a busca), compra python (Expandir a busca)
coder coder » coder decoder (Expandir a busca), code code (Expandir a busca), decoder codec (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder coder python demographical variables ) OR ( _ python python python programming ))~.