Perhaps you should try some spelling variations:
"improving rural performance measures." » "improving euract performance measures.", "improving larval performance measures.", "improving pupil performance measures."
"improving under performance targets." » "improving gender performance targets.", "improving und performance targets.", "improving der performance targets.", "improving inter performance targets.", "improving upper performance targets."

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

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