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 contract." » "Global environmental performance contracts."

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 contract."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("global environmental performance series.") OR ("Global environmental performance contract."))*.
• Removing quotes may allow a broader search: (( global environmental performance series. ) or ( Global environmental performance contract. ))*.