Perhaps you should try some spelling variations:
"based computation using ranking problem" » "based computational using ranking problem" (Expand search), "based competition using ranking problem" (Expand search), "based compilation using ranking problem" (Expand search), "based computations using ranking problem" (Expand search), "based computation in ranking problem" (Expand search), "based composition using ranking problem" (Expand search), "based computation using packing problem" (Expand search), "based computation using making problem" (Expand search), "based computation using landing problem" (Expand search), "based computation using stacking problem" (Expand search), "based computation using resting problem" (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: (("based computation using ranking problem") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based computation using ranking problem\") OR (\"using python python python programming\"))".
• Removing quotes may allow a broader search: (( based computation using ranking problem ) OR ( using python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("based computation using ranking problem") OR ("using python python python programming"))*.