Talvez deva tentar algumas variações de ortografia:
demographical variables » demographic variables (Expandir a busca), demographics variables (Expandir a busca), geographical variables (Expandir a busca)
socio demographical » socio demographic (Expandir a busca), socio demographics (Expandir a busca), socio demograficas (Expandir a busca)
python coding » action coding (Expandir a busca), python code (Expandir a busca)
coding python » codigo python (Expandir a busca), codigos python (Expandir a busca), using python (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
coder coder » coder decoder (Expandir a busca), code code (Expandir a busca), decoder codec (Expandir a busca)
coder socio » poder socio (Expandir a busca), under socio (Expandir a busca), power socio (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

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