Perhaps you should try some spelling variations:
"improving emotional performance reports." » "improving national performance reports.", "improving operational performance reports.", "improving educational performance reports.", "improving maternal performance reports.", "improving emotional performance report."
"improve external performance series." » "improve materials performance series.", "improve thermal performance series.", "improve sectoral performance series.", "improve external performance studies.", "improve external performance size.", "improve maternal performance series.", "improving external performance series.", "approval external performance series."

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