Perhaps you should try some spelling variations:
competencies control » competencia controle (Expand search), competencias contra (Expand search), companies control (Expand search)
control problems » control program (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
cost python » costa pithon (Expand search), monty python (Expand search)
using cost » using cone (Expand search), using co (Expand search), using co2 (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: "(( coder AND competencies control problems ) OR ( using cost python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder AND competencies control problems ) OR ( using cost python python programming ))*.