Perhaps you should try some spelling variations:
"coder coder proving concurrent program" » "coder coder during concurrent program" (Expand search), "coder coder testing concurrent program" (Expand search), "coder coder proving concurrent programs" (Expand search), "coder coder proving concurrent programming" (Expand search), "coder decoder proving concurrent program" (Expand search), "code code proving concurrent program" (Expand search), "decoder codec proving concurrent program" (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 proving concurrent program") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder proving concurrent program\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder proving concurrent program ) OR ( api python python python programming ))*.