Perhaps you should try some spelling variations:
"global environmental performance series." » "global environment performance series.", "global environmental performance studies.", "global environmental performance size."
"global environmental performance reports." » "global environment performance reports.", "global environmental performance report."

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

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