Perhaps you should try some spelling variations:
"improving rural performance contract." » "improving rural performance contracts.", "improving euract performance contract.", "improving larval performance contract.", "improving pupil performance contract."
"improving social performance evidence." » "improving school performance evidence.", "improving fiscal performance evidence.", "improving financial 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 social performance evidence.") or ("improving rural performance contract."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving social performance evidence.") OR ("improving rural performance contract."))*.
• Removing quotes may allow a broader search: (( improving social performance evidence. ) or ( improving rural performance contract. ))*.