Perhaps you should try some spelling variations:
"improving outdoor performance review." » "improving outdoor performances review.", "improving outcomes performance review.", "improving poor performance review.", "improving outdoor performance risk.", "improving outdoor performance evidence.", "improving indoor performance review.", "improving our performance review."
"improving rural performance contracts." » "improving euract performance contracts.", "improving larval performance contracts.", "improving pupil performance contracts."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("improving rural performance contracts.") or ("improving outdoor performance review."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving rural performance contracts.") OR ("improving outdoor performance review.")).
• Removing quotes may allow a broader search: (( improving rural performance contracts. ) or ( improving outdoor performance review. )).
• Adding a wildcard symbol may retrieve word variants: (("improving rural performance contracts.") or ("improving outdoor performance review."))*.