Perhaps you should try some spelling variations:
"coder coder binary unsolved problem" » "coder coder binary solve problems" (Expand search), "coder cover binary unsolved problem" (Expand search), "coder over binary unsolved problem" (Expand search), "coder under binary unsolved problem" (Expand search), "coder decoder binary unsolved problem" (Expand search), "code code binary unsolved problem" (Expand search), "decoder codec binary unsolved 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 binary unsolved problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder binary unsolved problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder binary unsolved problem ) OR ( api python python python programming ))*.