Perhaps you should try some spelling variations:
"improving seismic performance measures." » "improving logistics performance measures.", "improving economic performance measures.", "improving academic performance measures.", "improving service performance measures.", "improving basic performance measures.", "improving statistics performance measures."
"improving based performance based." » "improving bank performance based.", "improving care performance based.", "improving board performance based.", "improving basic performance based.", "improving shared performance based.", "improving water performance based."

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

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