Perhaps you should try some spelling variations:
"while proper commentary" » "while proper comments", "while problems commentary", "while popular commentary", "stile proper commentary", "while prone commentary", "while prime commentary"
"while paper commentary" » "while later commentary", "while layer commentary", "while paper kommentar", "white paper commentary", "while pair commentary", "while chapter commentary"

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"while paper commentary\") OR (\"while proper commentary\"))".
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