Perhaps you should try some spelling variations:
"improving firm performances review." » "improving firm performance review.", "improving firm performance reviews.", "improving firm performances series.", "improving firms performance review.", "improving from performance review.", "improving firms performances review.", "improving air performances review.", "improving erm performances review."
"improving euract performance metrics." » "improving euract performance measures.", "improving act performance metrics.", "improving impact performance metrics.", "improving contract performance metrics.", "improving rural performance metrics.", "improving neural performance metrics.", "improving accuracy performance metrics."

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

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