Perhaps you should try some spelling variations:
"global environmental governance system." » "global environmental performance system.", "global environment governance system.", "global environmental governance issues."
"legal environment performance series." » "legal environmental performance series.", "legal environmental performances series.", "legal government performance series.", "legal environment performance metrics.", "legal environment performance reviews.", "legal environment performance review.", "global environment performance series."

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