Perhaps you should try some spelling variations:
"challenge posed python python programming" » "challenges posed python python programming" (Expand search), "challenge based python python programming" (Expand search), "challenges imposed python python programming" (Expand search), "challenge posed pythons python programming" (Expand search), "challenge posed piton python programming" (Expand search), "challenge posed pitons python programming" (Expand search)
"coder solutions in coding program" » "coder solution in coding program" (Expand search), "holder solutions in coding program" (Expand search), "powder solutions in coding program" (Expand search), "coder solutions in cloning program" (Expand search), "coder solutions in loading program" (Expand search), "coder solutions in cooling programs" (Expand search), "coder solutions _ coding program" (Expand search), "coder solutions on coding program" (Expand search), "coder solutions in decoding program" (Expand search), "coder solutions non coding program" (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 solutions in coding program") OR ("challenge posed python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder solutions in coding program\") OR (\"challenge posed python python programming\"))*".
• Removing quotes may allow a broader search: (( coder solutions in coding program ) OR ( challenge posed python python programming ))*.