Perhaps you should try some spelling variations:
"coder coder robin subsequence problem" » "coder coder robin sequence problem" (Expand search), "coder coder common subsequence problem" (Expand search), "coder decoder robin subsequence problem" (Expand search), "code code robin subsequence problem" (Expand search), "decoder codec robin subsequence problem" (Expand search), "coder cohen robin subsequence problem" (Expand search), "coder couedel robin subsequence 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 robin subsequence problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder robin subsequence problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder robin subsequence problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder robin subsequence problem") OR ("api python python python programming"))*.