Perhaps you should try some spelling variations:
"developer perception using sio2 program" » "developer perceptions using sio2 program" (Expand search), "developers perceptions using sio2 program" (Expand search), "development perception using sio2 program" (Expand search), "developer perception during sio2 program" (Expand search), "developer perception among sio2 program" (Expand search), "developer perception and sio2 program" (Expand search), "developer perception using 2 program" (Expand search), "developer perception using 2012 program" (Expand search), "developer perception using 2002 program" (Expand search), "developer perception using tio2 program" (Expand search), "developer perception using six program" (Expand search)
"using python python python programming" » "using pythons python python programming" (Expand search), "using piton python python programming" (Expand search), "using pitons python python programming" (Expand search), "usando python python python programming" (Expand search), "in python 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 perception using sio2 program") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"developer perception using sio2 program\") OR (\"using python python python programming\"))*".
• Removing quotes may allow a broader search: (( developer perception using sio2 program ) OR ( using python python python programming ))*.