Perhaps you should try some spelling variations:
"coder coder case clustering problem" » "coder coder case covering problem" (Expand search), "coder coder based clustering problem" (Expand search), "coder coder class clustering problem" (Expand search), "coder coder face clustering problem" (Expand search), "coder decoder case clustering problem" (Expand search), "code code case clustering problem" (Expand search), "decoder codec case clustering problem" (Expand search), "coder border case clustering problem" (Expand search), "coder power case clustering problem" (Expand search), "coder lower case 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 coder case clustering problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder case clustering problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder case clustering problem ) OR ( api python python python programming ))*.