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

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