Perhaps you should try some spelling variations:
"improving animal performance risks." » "improving annual performance risks.", "improving fiscal performance risks.", "improving social performance risks.", "improving animal performance risk.", "improving initial performance risks.", "improving optimal performance risks.", "improving criminal performance risks."
"improving thermal performance measures." » "improving external performance measures.", "improving erm performance measures.", "improving federal performance measures."

Try widening your search to All Fields.

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

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