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

Try widening your search to All Fields.

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