Perhaps you should try some spelling variations:
"based computational using ranking problems" » "and computational using ranking problems" (Expand search), "by computational using ranking problems" (Expand search), "based computation using ranking problems" (Expand search), "based computations using ranking problems" (Expand search), "based computacional usinas ranking problems" (Expand search), "based computational using ranking problem" (Expand search), "based computational using banking problems" (Expand search), "based computational using drinking problems" (Expand search), "based computational using stacking problems" (Expand search), "based computational using resting problems" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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: "((\"based computational using ranking problems\") OR (\"using codigo python python programming\"))~".
• Removing quotes may allow a broader search: (( based computational using ranking problems ) OR ( using codigo python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based computational using ranking problems") OR ("using codigo python python programming"))*.