Perhaps you should try some spelling variations:
"global environment governance system." » "global environmental governance system.", "global enforcement governance system.", "global investment governance system.", "global environment governance issues."
"level engagement governance series." » "level management governance series.", "level enforcement governance series.", "level empowerment governance series.", "level engagement governance issues.", "civic engagement governance series.", "level agreement governance 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: (("level engagement governance series.") or ("global environment governance system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("level engagement governance series.") OR ("global environment governance system.")).
• Removing quotes may allow a broader search: (( level engagement governance series. ) or ( global environment governance system. )).
• Adding a wildcard symbol may retrieve word variants: (("level engagement governance series.") or ("global environment governance system."))*.