Perhaps you should try some spelling variations:
"elgar regional resilience" » "elgar regional science", "elter regional resilience", "algarve regional resilience", "war regional resilience"
"elgar original references" » "elgar origin references", "elgar origins references", "elgar marginal references", "einer original references"
"angr original references" » "angr origin references", "angr origins references", "angr marginal references", "age original references", "nor original references", "cancer original references"
"elgar regional reference" » "elgar regional conference", "elgar regional differences", "elgar regional convergence", "elter regional reference", "algarve regional reference", "war regional reference"

Try widening your search to All Fields.

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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 original references") OR ("angr original references")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elgar regional reference\") or (\"elgar regional resilience\"))) or (((\"elgar original references\") OR (\"angr original references\"))))".
• Removing quotes may allow a broader search: (((( elgar regional reference ) or ( elgar regional resilience ))) or ((( elgar original references ) OR ( angr original references )))).
• Adding a wildcard symbol may retrieve word variants: (((("elgar regional reference") or ("elgar regional resilience"))) or ((("elgar original references") OR ("angr original references"))))*.