Perhaps you should try some spelling variations:
"improving euract performance contract." » "improving euract performance contracts.", "improving act performance contract.", "improving impact performance contract.", "improving contract performance contract.", "improving neural performance contract.", "improving accuracy performance contract.", "improving effects performance contract."
"improving rural performance evidence." » "improving larval performance evidence.", "improving pupil performance evidence.", "improving human performance evidence."

Try widening your search to All Fields.

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