Perhaps you should try some spelling variations:
"improving global performance measures." » "improving total performance measures.", "improving regional performance measures.", "improving general performance measures.", "improving fiscal performance measures.", "improving growth performance measures.", "providing global performance measures."
"improving thermal performance 2019." » "improving external performance 2019.", "improving animal performance 2019.", "improving erm performance 2019.", "improving thermal performance _.", "improving thermal performance a."

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 2019.") or ("improving global performance measures."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving thermal performance 2019.") OR ("improving global performance measures.")).
• Removing quotes may allow a broader search: (( improving thermal performance 2019. ) or ( improving global performance measures. )).
• Adding a wildcard symbol may retrieve word variants: (("improving thermal performance 2019.") or ("improving global performance measures."))*.