Perhaps you should try some spelling variations:
"coder coder and concurrent program" » "coder coder and concurrent programs" (Expand search), "coder coder and concurrent programming" (Expand search), "coder coder and current program" (Expand search), "coder coder and recurrent program" (Expand search), "coder coder of concurrent program" (Expand search), "coder decoder and concurrent program" (Expand search), "code code and concurrent program" (Expand search), "decoder codec and concurrent program" (Expand search), "coder code and concurrent program" (Expand search), "coder codes and concurrent program" (Expand search), "coder poder and concurrent program" (Expand search)
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ python python python programming" (Expand search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder and concurrent program") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder and concurrent program\") OR (\"in python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder and concurrent program ) OR ( in python python python programming ))*.