Perhaps you should try some spelling variations:
"improving euract performance measures." » "improving act performance measures.", "improving impact performance measures.", "improving contract performance measures.", "improving rural performance measures.", "improving neural performance measures.", "improving accuracy performance measures."
"improving human performance risks." » "improving loan performance risks.", "improving thermal performance risks.", "improving chain performance risks.", "improving human performance risk."

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