Perhaps you should try some spelling variations:
"coder coder rewriting concurrent program" » "coder coder testing concurrent program" (Expand search), "coder coder during concurrent program" (Expand search), "coder coder proving concurrent program" (Expand search), "coder coder rewriting concurrent programs" (Expand search), "coder coder rewriting concurrent programming" (Expand search), "coder decoder rewriting concurrent program" (Expand search), "code code rewriting concurrent program" (Expand search), "decoder codec rewriting 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.

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