Perhaps you should try some spelling variations:
"and computational using clustering problem" » "and computation using clustering problem" (Expand search), "and computations using clustering problem" (Expand search), "and computacional usinas clustering problem" (Expand search), "and computational using covering problem" (Expand search), "_ computational using clustering problem" (Expand search), "and computational and clustering problem" (Expand search), "and computational means clustering problem" (Expand search)
"using in python python programming" » "using in pythons python programming" (Expand search), "using in piton python programming" (Expand search), "using in pitons python programming" (Expand search), "using _ 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: "((\"and computational using clustering problem\") OR (\"using in python python programming\"))~".
• Removing quotes may allow a broader search: (( and computational using clustering problem ) OR ( using in python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computational using clustering problem") OR ("using in python python programming"))*.