Perhaps you should try some spelling variations:
"improving fiscal performance series." » "improving financial performance series.", "improving fiscal performance studies.", "improving fiscal performance size."
"improving und performance measures." » "improving fund performance measures.", "improving funds performance measures.", "improving good performance measures.", "improving food performance measures.", "improving burn performance measures.", "improving feed performance measures."

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

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