Perhaps you should try some spelling variations:
"global enforcement governance system." » "global efficient governance system.", "global empowerment governance system.", "legal enforcement governance system.", "alabama enforcement governance system.", "law enforcement governance system."
"global environmental performance series." » "global environment performance series.", "global environmental performance studies.", "global environmental performance size."

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