Perhaps you should try some spelling variations:
"improving animal performance metrics." » "improving animal performance measures.", "improving annual performance metrics.", "improving thermal performance metrics.", "improving fiscal performance metrics.", "improving initial performance metrics.", "improving optimal performance metrics.", "improving criminal performance metrics."
"improving pupil performance metrics." » "improving pupil performance measures.", "improving social performance metrics.", "improving model performance metrics.", "improving judicial performance metrics.", "improving public performance metrics.", "improving civil performance metrics.", "improving audit performance metrics."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("improving animal performance metrics.") or ("improving pupil performance metrics."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving animal performance metrics.") OR ("improving pupil performance metrics.")).
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