Perhaps you should try some spelling variations:
"coder coder pure theory problem" » "coder coder pure theory problems" (Expand search), "coder coder pure the problem" (Expand search), "coder coder pure theory program" (Expand search), "coder decoder pure theory problem" (Expand search), "code code pure theory problem" (Expand search), "decoder codec pure theory problem" (Expand search), "coder under pure theory problem" (Expand search), "coder boer pure theory problem" (Expand search), "coder powders pure theory 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), "manim 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 pure theory problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder pure theory problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder pure theory problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder pure theory problem") OR ("api python python python programming"))*.