Perhaps you should try some spelling variations:
"improving social performance contract." » "improving social performance contracts.", "improving school performance contract.", "improving fiscal performance contract.", "improving financial performance contract."
"improving rural performance evidence." » "improving pupil performance evidence.", "improving thermal performance evidence.", "improving overall performance evidence.", "improving urban performance evidence."

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 evidence.") or ("improving social performance contract."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving rural performance evidence.") OR ("improving social performance contract."))*.
• Removing quotes may allow a broader search: (( improving rural performance evidence. ) or ( improving social performance contract. ))*.