Perhaps you should try some spelling variations:
"improving court performance series." » "improving court performance studies.", "improving court performance size.", "improving country performance series.", "improving export performance series.", "improving our performance series.", "improving your performance series.", "improving care performance series."
"improving road performance review." » "improving road performance risk.", "improving road performance evidence.", "improving board performance review.", "improving good performance review.", "improving bond performance review.", "improving food performance review.", "improving rural performance review."

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