Perhaps you should try some spelling variations:
"code migration using declarative programming" » "code migration mining declarative programming" (Expand search), "code migration in declarative programming" (Expand search), "code migration engine declarative programming" (Expand search), "code migration during declarative programming" (Expand search), "code vibration using declarative programming" (Expand search), "code operation using declarative programming" (Expand search), "the migration using declarative programming" (Expand search), "time migration using declarative programming" (Expand search), "live migration using declarative 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: (("code migration using declarative programming") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"code migration using declarative programming\") OR (\"using coding python python programming\"))*".
• Removing quotes may allow a broader search: (( code migration using declarative programming ) OR ( using coding python python programming ))*.