Perhaps you should try some spelling variations:
"improving seismic performance metrics." » "improving seismic performance measures.", "improving economic performance metrics.", "improving academic performance metrics.", "improving semantic performance metrics.", "improving service performance metrics.", "improving basic performance metrics."
"improving based performance based." » "improving board performance based.", "improving fund performance based.", "improving good performance based.", "improving basic performance based.", "improving care performance based.", "improving asset 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 metrics.") OR ("improving based performance based."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving seismic performance metrics.\") OR (\"improving based performance based.\"))".
• Removing quotes may allow a broader search: (( improving seismic performance metrics. ) OR ( improving based performance based. )).
• Adding a wildcard symbol may retrieve word variants: (("improving seismic performance metrics.") OR ("improving based performance based."))*.