Perhaps you should try some spelling variations:
"using computational and clustering problem" » "and computational and clustering problem" (Expand search), "using computational and covering problem" (Expand search), "using computational fluid clustering problem" (Expand search), "using computational data clustering problem" (Expand search), "using computational _ 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.

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