Perhaps you should try some spelling variations:
"improving company performance reviews." » "improving country performance reviews.", "improving company performance review.", "improving company performance reports.", "improving company performance risks.", "improve company performance reviews.", "improving compliance performance reviews.", "improving community performance reviews."
"improving animal performance series." » "improving annual performance series.", "improving thermal performance series.", "improving fiscal performance series.", "improving animal performance studies.", "improving animal performance size.", "improving initial performance series.", "improving optimal performance series.", "improving criminal performance series."

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

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