Perhaps you should try some spelling variations:
"improving social performance reviews." » "improving social performance reports.", "improving social performance risks.", "improving social performance results.", "improving social performance evidences.", "improving school performance reviews.", "improving fiscal performance reviews.", "improving financial performance reviews."
"improving can performance review." » "improving can performance risk.", "improving can performance evidence.", "improving chain performance review.", "improving loan performance review.", "improving human performance review.", "improving care performance review.", "improving a performance review.", "improving co performance review."

You may be able to get more results by adjusting your search query.

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