Perhaps you should try some spelling variations:
"coder coder strings open problems" » "coder model strings open problems" (Expand search), "coder encoded strings open problems" (Expand search), "coder closed strings open problems" (Expand search), "coder coder strings on problems" (Expand search), "coder coder strings when problems" (Expand search), "coder coder things open problems" (Expand search), "coder decoder strings open problems" (Expand search), "code code strings open problems" (Expand search), "decoder codec strings open problems" (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 strings open problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder strings open problems\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder strings open problems ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder strings open problems") OR ("api python python python programming"))*.