Perhaps you should try some spelling variations:
demographical variables » demographic variables (Expand search), demographics variables (Expand search), geographical variables (Expand search)
socio demographical » socio demographic (Expand search), socio demographics (Expand search), socio demograficas (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
coder coder » coder decoder (Expand search), code code (Expand search), decoder codec (Expand search)
coder socio » poder socio (Expand search), under socio (Expand search), power socio (Expand search)
on python » in python (Expand search), of python (Expand search), _ python (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( coder coder socio demographical variables ) OR ( on python python python programming ))~.