Perhaps you should try some spelling variations:
potencial contra » potential control (Expand search), potencial cortical (Expand search), potencia controle (Expand search)
testing methods » costing methods (Expand search), test methods (Expand search), feeding methods (Expand search)
contra program » contract program (Expand search), control program (Expand search), contrato programa (Expand search)
methods python » methods action (Expand search), pythons python (Expand search), methods method (Expand search)
and potencial » and potential (Expand search), and potentials (Expand search), grande potencial (Expand search)
using testing » using resting (Expand search), using nesting (Expand search), ring testing (Expand search)
coder and » code and (Expand search), codes and (Expand search), poder and (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( coder AND potencial contra program ) OR ( using testing methods python programming ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( coder and potencial contra program ) OR ( using testing methods python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder and potencial contra program ) OR ( using testing methods python programming ))*.