Perhaps you should try some spelling variations:
"coder coder and operating procedure" » "coder coder and operations procedure" (Expand search), "coder coder and operation procedure" (Expand search), "coder coder and operational procedure" (Expand search), "coder decoder and operating procedure" (Expand search), "code code and operating procedure" (Expand search), "decoder codec and operating procedure" (Expand search), "coder code and operating procedure" (Expand search), "coder codes and operating procedure" (Expand search), "coder poder and operating procedure" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python python programming" (Expand search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder and operating procedure") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder and operating procedure\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder and operating procedure ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder and operating procedure") OR ("_ python python python programming"))*.