Perhaps you should try some spelling variations:
"improving judicial performance contracts." » "improving social performance contracts.", "improving financial performance contracts.", "improving fiscal performance contracts.", "improving municipal performance contracts.", "improve judicial performance contracts."
"improving overall performance series." » "improving average performance series.", "improving thermal performance series.", "improving governance performance series.", "improving overall performance studies.", "improving overall performance size.", "improving coverage performance series.", "improving rural performance series.", "improving federal performance series."

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