Perhaps you should try some spelling variations:
"using computational using persistence problem" » "and computational using persistence problem" (Expand search), "using computation using persistence problem" (Expand search), "using computations using persistence problem" (Expand search), "using computacional usinas persistence problem" (Expand search), "using computational using persistence problems" (Expand search), "using computational using persistente problema" (Expand search), "using computational using resistance problem" (Expand search), "using computational using persistent problem" (Expand search), "using computational turing persistente problem" (Expand search), "using computational voting persistence problem" (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational using persistence problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( using computational using persistence problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational using persistence problem") OR ("using coding python python programming"))*.