Perhaps you should try some spelling variations:
"improving e performance review." » "improving e performance evidence.", "improving 2 performance review.", "improving use performance review.", "improving care performance review.", "improving ex performance review.", "improving _ performance review.", "improving a performance review."
"improving erm performance risk." » "improving erm performance 2019.", "improving esm performance risk.", "improving firm performance risk.", "improving team performance risk.", "improving ers performance risk.", "improving eap performance risk.", "improving eco performance risk.", "improving exrm performance risk.", "improving _rm performance risk.", "improving arm performance risk."

Try widening your search to All Fields.

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