Perhaps you should try some spelling variations:
"global environment performance series." » "global environmental performance series.", "global environmental performances series.", "global investment performance series.", "global environment performance metrics.", "global environment performance reviews.", "global environment performance review."
"global government performance risk." » "global environmental performance risk.", "local government performance risk.", "local governments performance risk.", "total government performance risk.", "global government performance size.", "global government performance based.", "global government performance _."

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 performance series.") or ("global government performance risk."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("global environment performance series.") OR ("global government performance risk.")).
• Removing quotes may allow a broader search: (( global environment performance series. ) or ( global government performance risk. )).
• Adding a wildcard symbol may retrieve word variants: (("global environment performance series.") or ("global government performance risk."))*.