Perhaps you should try some spelling variations:
"based computation by clustering problem" » "based computation by covering problem" (Expand search), "based computational by clustering problem" (Expand search), "based competition by clustering problem" (Expand search), "based compilation by clustering problem" (Expand search), "based computation of clustering problem" (Expand search), "based computation _ clustering problem" (Expand search), "based computation in clustering problem" (Expand search), "based computation and clustering problem" (Expand search), "based computation by cluster 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 by clustering problem") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based computation by clustering problem\") OR (\"using python python python programming\"))".
• Removing quotes may allow a broader search: (( based computation by clustering problem ) OR ( using python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("based computation by clustering problem") OR ("using python python python programming"))*.