Perhaps you should try some spelling variations:
"improving food performance review." » "improving food performance risk.", "improving food performance evidence.", "improving good performance review.", "improving poor performance review.", "improving fund performance review.", "improving land performance review."
"improving court performance series." » "improving court performance metrics.", "improving court performance reviews.", "improving court performance targets.", "improving country performance series.", "improving export performance series.", "improving firm performance series.", "improving adult performance series.", "improving co performance series.", "improving youth performance series."

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

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