Perhaps you should try some spelling variations:
"Improving animal performance series." » "Improving animal performance metrics.", "Improving animal performance reviews.", "Improving animal performance review.", "Improving annual performance series.", "Improving fiscal performance series.", "Improving social performance series."
"improving thermal performance series." » "improving thermal performance metrics.", "improving thermal performance reviews.", "improving thermal performance review.", "improving maternal performance series.", "improving rural performance series.", "improving human performance series."
improving animal » improving criminal, improving primary, improving climate

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Improving animal performance series.") OR ("improving thermal performance series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Improving animal performance series.\") OR (\"improving thermal performance series.\"))".
• Removing quotes may allow a broader search: (( Improving animal performance series. ) OR ( improving thermal performance series. )).
• Adding a wildcard symbol may retrieve word variants: (("Improving animal performance series.") OR ("improving thermal performance series."))*.