Perhaps you should try some spelling variations:
"improving social performance reviews." » "improving social performance review.", "improving social performance reports.", "improving social performance risks.", "improving school performance reviews.", "improving fiscal performance reviews.", "improving financial performance reviews."
"improving larval performance targets." » "improving level performance targets.", "improving thermal performance targets.", "improving maximal performance targets.", "improving local performance targets.", "improving legal performance targets.", "improving land performance targets."

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

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