Perhaps you should try some spelling variations:
"coder coder safe concurrent program" » "coder coder safe concurrent programs" (Expand search), "coder coder safe concurrent programming" (Expand search), "coder coder scale concurrent program" (Expand search), "coder coder soft concurrent program" (Expand search), "coder coder based concurrent program" (Expand search), "coder decoder safe concurrent program" (Expand search), "code code safe concurrent program" (Expand search), "decoder codec safe 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 safe concurrent program") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder safe concurrent program\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder safe concurrent program ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder safe concurrent program") OR ("api python python python programming"))*.