Perhaps you should try some spelling variations:
"global enforcement governance system." » "global empowerment governance system.", "global environmental governance system.", "legal enforcement governance system.", "law enforcement governance system.", "global environment governance system.", "global enforcement governance issues."
"legal environmental performance series." » "legal environment performance series.", "legal environments performance series.", "local environmental performance series.", "legal environmental performance metrics.", "legal environmental performance reviews.", "legal environmental performance review."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("global enforcement governance system.") OR ("legal environmental performance series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"global enforcement governance system.\") OR (\"legal environmental performance series.\"))".
• Removing quotes may allow a broader search: (( global enforcement governance system. ) OR ( legal environmental performance series. )).
• Adding a wildcard symbol may retrieve word variants: (("global enforcement governance system.") OR ("legal environmental performance series."))*.