Perhaps you should try some spelling variations:
"elgar regional resilience" » "elgar regional science", "elgar operational resilience", "elter regional resilience", "algarve regional resilience", "war regional resilience"
"elgar regional reference" » "elgar regional conference", "elgar regional differences", "elgar regional convergence", "elter regional reference", "algarve regional reference", "war regional reference"
colour originals » curious originals, four original, colour retinal
elgar originals » delete originals, german originals

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("elgar regional reference") OR ("elgar regional resilience"))) OR ("((elgar originals) or (colour originals)) references")).
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• Adding a wildcard symbol may retrieve word variants: (((("elgar regional reference") OR ("elgar regional resilience"))) or ("((elgar originals) or (colour originals)) references"))*.