Perhaps you should try some spelling variations:
"improving company performance metrics." » "improving company performance contracts.", "improving company performance contract.", "improving country performance metrics.", "improving loan performance metrics.", "improving corporate performance metrics.", "improving human performance metrics."
"improving social performance measures." » "improving school performance measures.", "improving fiscal performance measures.", "improving financial performance measures."

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