Perhaps you should try some spelling variations:
"global environment governance series." » "global environmental governance series.", "global enforcement governance series.", "global investment governance series.", "global environment governance issues."
"global environment governance system." » "global environmental governance system.", "global enforcement governance system.", "global investment governance system.", "global environment governance issues."

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

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