Perhaps you should try some spelling variations:
"coder modeling using clustering problem" » "coder modeling using covering problem" (Expand search), "coder modeling and clustering problem" (Expand search), "coder modeling means clustering problem" (Expand search), "cover modeling using clustering problem" (Expand search), "cover modelling using clustering problem" (Expand search), "order modeling using clustering problem" (Expand search), "coder model using clustering problem" (Expand search), "coder models using clustering problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa 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: (("coder modeling using clustering problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder modeling using clustering problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder modeling using clustering problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder modeling using clustering problem") OR ("api python python python programming"))*.