Perhaps you should try some spelling variations:
"coastal bone management." » "coastal zone management.", "coastal one management.", "coastal bond management.", "coastal zones management.", "coastal corner management."
"coastal dune management." » "coastal zone management.", "coastal line management.", "coastal mine management.", "coastal dunes management."

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coastal bone management.\") OR (\"coastal dune management.\"))".
• Removing quotes may allow a broader search: (( coastal bone management. ) OR ( coastal dune management. )).
• Adding a wildcard symbol may retrieve word variants: (("coastal bone management.") OR ("coastal dune management."))*.