Perhaps you should try some spelling variations:
"improving safety performance risk." » "improving market performance risk.", "improving key performance risk.", "improving quality performance risk.", "improving water performance risk.", "improving safety performance size.", "improving safety performance based.", "improving safety performance _."
"improving care performance review." » "improving care performance evidence.", "improving market performance review.", "improving trade performance review.", "improving court performance review.", "improving water performance review.", "improving early performance review.", "improving land performance review."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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