Perhaps you should try some spelling variations:
contracts programming » constraint programming (Expand search), control programming (Expand search), content programming (Expand search)
closed contracts » close contacts (Expand search), cloud contracts (Expand search), based contracts (Expand search)
python closed » python based (Expand search), python code (Expand search), within closed (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
in python » _ python (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( codigo python closed contracts programming ) OR ( using in python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( codigo python closed contracts programming ) OR ( using in python python programming ))*.