Perhaps you should try some spelling variations:
"improving seismic performance series." » "improving logistics performance series.", "improving economic performance series.", "improving academic performance series.", "improving seismic performance metrics.", "improving seismic performance reviews.", "improving seismic performance review.", "improving service performance series.", "improving basic performance series.", "improving statistics performance series."
"improving past performance risk." » "improving plant performance risk.", "improving port performance risk.", "improving based performance risk.", "improving past performance size.", "improving past performance based.", "improving past performance _.", "improving basic performance risk.", "improving asset performance risk.", "improving land performance risk."

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 series.") OR ("improving past performance risk."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving seismic performance series.\") OR (\"improving past performance risk.\"))".
• Removing quotes may allow a broader search: (( improving seismic performance series. ) OR ( improving past performance risk. )).
• Adding a wildcard symbol may retrieve word variants: (("improving seismic performance series.") OR ("improving past performance risk."))*.