Perhaps you should try some spelling variations:
"improving company performance review." » "improving country performance review.", "improving company performance risk.", "improving company performance evidence.", "improve company performance review.", "improving compliance performance review.", "improving community performance review."
"improving thermal performance targets." » "improving external performance targets.", "improving animal performance targets.", "improving erm performance targets."

Try widening your search to All Fields.

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