Perhaps you should try some spelling variations:
"improving urban performance metrics." » "improving urban performance contracts.", "improving urban performance measures.", "improving urban performance contract.", "improving bank performance metrics.", "improving loan performance metrics.", "improving can performance metrics."
"improving firms performance reviews." » "improving firms performance review.", "improving firms performance reports.", "improving firms performance risks.", "improving firm performance reviews.", "improving firm performances reviews.", "improving funds performance reviews.", "improving farmers performance reviews.", "improving air performance reviews.", "improving birth performance reviews."

Try widening your search to All Fields.

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