Perhaps you should try some spelling variations:
"coder coder programming open problems" » "coder modern programming open problems" (Expand search), "coder cone programming open problems" (Expand search), "coder order programming open problems" (Expand search), "coder coder programming on problems" (Expand search), "coder coder programming over problems" (Expand search), "coder coder programming other problems" (Expand search), "coder decoder programming open problems" (Expand search), "code code programming open problems" (Expand search), "decoder codec programming 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)

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 programming open problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder programming open problems\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder programming open problems ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder programming open problems") OR ("api python python python programming"))*.