Perhaps you should try some spelling variations:
"improving public performance reviews." » "improving public performance review.", "improving public performance reports.", "improving public performance risks.", "improving music performance reviews.", "improving policy performance reviews."
"improving urban performance metrics." » "improving urban performance measures.", "improving bank performance metrics.", "improving loan performance metrics.", "improving human 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 public performance reviews.") OR ("improving urban performance metrics."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving public performance reviews.\") OR (\"improving urban performance metrics.\"))*".
• Removing quotes may allow a broader search: (( improving public performance reviews. ) OR ( improving urban performance metrics. ))*.