Perhaps you should try some spelling variations:
"improving company performance contract." » "improving company performance contracts.", "improving country performance contract.", "improve company performance contract.", "improving compliance performance contract.", "improving community performance contract."
"improving rural performance evidence." » "improving euract performance evidence.", "improving larval performance evidence.", "improving pupil 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 company performance contract."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving rural performance evidence.") OR ("improving company performance contract.")).
• Removing quotes may allow a broader search: (( improving rural performance evidence. ) or ( improving company performance contract. )).
• Adding a wildcard symbol may retrieve word variants: (("improving rural performance evidence.") or ("improving company performance contract."))*.