Perhaps you should try some spelling variations:
"improving company performance measures." » "improving country performance measures.", "improving loan performance measures.", "improving corporate performance measures.", "improving human performance measures."
"improving thermal performance risks." » "improving maternal performance risks.", "improving rural performance risks.", "improving human performance risks.", "improving thermal performance risk.", "improving thermal performance issues.", "improving thermal performance based."

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