Perhaps you should try some spelling variations:
"improving maternal performance reviews." » "improving materials performance reviews.", "improving external performance reviews.", "improving national performance reviews.", "improving maternal performance review.", "improving maternal performance reports.", "improving maternal performance risks.", "improve maternal performance reviews.", "improving water performance reviews."
"improving loan performance metrics." » "improving loan performance measures.", "improving local performance metrics.", "improving land performance metrics.", "improving lead 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 maternal performance reviews.") OR ("improving loan performance metrics."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving maternal performance reviews.\") OR (\"improving loan performance metrics.\"))".
• Removing quotes may allow a broader search: (( improving maternal performance reviews. ) OR ( improving loan performance metrics. )).
• Adding a wildcard symbol may retrieve word variants: (("improving maternal performance reviews.") OR ("improving loan performance metrics."))*.