Perhaps you should try some spelling variations:
"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."
"improving loan performance measures." » "improving poor performance measures.", "improving bank performance measures.", "improving _ performance measures.", "improving local performance measures.", "improving land performance measures.", "improving road 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 loan performance measures.") or ("improving thermal performance risks."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving loan performance measures.") OR ("improving thermal performance risks.")).
• Removing quotes may allow a broader search: (( improving loan performance measures. ) or ( improving thermal performance risks. )).
• Adding a wildcard symbol may retrieve word variants: (("improving loan performance measures.") or ("improving thermal performance risks."))*.