Perhaps you should try some spelling variations:
"improving contract performance review." » "improving country performance review.", "improving court performance review.", "improving economic performance review.", "improve contract performance review.", "improving central performance review.", "improve contrast performance review.", "improving contract performance risk.", "improving contract performance evidence."
"improving fiscal performance series." » "improving financial performance series.", "improving fiscal performance studies.", "improving fiscal performance size."

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

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