Perhaps you should try some spelling variations:
"coder coder challenge unit problem" » "coder tower challenge unit problem" (Expand search), "coder under challenge unit problem" (Expand search), "coder elders challenge unit problem" (Expand search), "coder coder challenge not problem" (Expand search), "coder coder challenges union problem" (Expand search), "coder coder challenge using problem" (Expand search), "coder decoder challenge unit problem" (Expand search), "code code challenge unit problem" (Expand search), "decoder codec challenge unit 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 challenge unit problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder challenge unit problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder challenge unit problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder challenge unit problem") OR ("api python python python programming"))*.