Perhaps you should try some spelling variations:
"and computation using clustering problem" » "and computation using covering problem" (Expand search), "and computations using clustering problem" (Expand search), "and computation in clustering problem" (Expand search), "and composition using clustering problem" (Expand search), "and computation and clustering problem" (Expand search), "and computation means clustering problem" (Expand search), "and computational using clustering problem" (Expand search), "of computation using clustering 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: (("and computation using clustering problem") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and computation using clustering problem\") OR (\"using python python python programming\"))*".
• Removing quotes may allow a broader search: (( and computation using clustering problem ) OR ( using python python python programming ))*.