Perhaps you should try some spelling variations:
"improving pupil performance contract." » "improving pupil performance contracts.", "improving social performance contract.", "improving fund performance contract.", "improving judicial performance contract.", "improving public performance contract.", "improving supply performance contract.", "improving civil performance contract."
"improving rural performance series." » "improving rural performance metrics.", "improving rural performance reviews.", "improving rural performance review.", "improving thermal performance series.", "improving overall performance series.", "improving fiscal performance series.", "improving urban performance series.", "improving social performance series."

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