Perhaps you should try some spelling variations:
"and computational in clustering problem" » "and computational in covering problem" (Expand search), "_ computational in clustering problem" (Expand search), "and computational and clustering problem" (Expand search), "and computational _ clustering problem" (Expand search), "and computational 3d clustering problem" (Expand search), "and computational on clustering problem" (Expand search), "and computational spin clustering problem" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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 in clustering problem\") OR (\"using codigo python python programming\"))~".
• Removing quotes may allow a broader search: (( and computational in clustering problem ) OR ( using codigo python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computational in clustering problem") OR ("using codigo python python programming"))*.