Perhaps you should try some spelling variations:
"improving rural performance targets." » "improving pupil performance targets.", "improving thermal performance targets.", "improving overall performance targets.", "improving urban performance targets.", "improving social performance targets."
"improving rail performance risk." » "improving railway performance risk.", "improving pupil performance risk.", "improving bank performance risk.", "improving rail performance size.", "improving rail performance based.", "improving rail performance _.", "improving air performance risk.", "improving soil performance risk."

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

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