Perhaps you should try some spelling variations:
"developer perceptions using active programming" » "developers perceptions using active programming" (Expand search), "development perception using active programming" (Expand search), "developer relations using active programming" (Expand search), "developer perceptions using reactive programming" (Expand search), "developer perceptions using octave programming" (Expand search), "developer perceptions using adaptive programming" (Expand search), "developer perception using active programming" (Expand search), "developer perceptions during active programming" (Expand search), "developer perceptions buying active programming" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking python python programming" (Expand search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("developer perceptions using active programming") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"developer perceptions using active programming\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( developer perceptions using active programming ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("developer perceptions using active programming") OR ("using coding python python programming"))*.