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 act performance metrics." » "improving act performance measures.", "improving awt performance metrics.", "improving past performance metrics.", "improving art performances metrics.", "improving ict performance metrics.", "improving fast performance metrics.", "improving air performance metrics."

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

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