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 series." » "global environmental performance series.", "global government performance metrics.", "global government performance reviews.", "global government performance review.", "local government performance series.", "local governments performance series.", "total government 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 environment performance series.") OR ("global government performance series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"global environment performance series.\") OR (\"global government performance series.\"))".
• Removing quotes may allow a broader search: (( global environment performance series. ) OR ( global government performance series. )).
• Adding a wildcard symbol may retrieve word variants: (("global environment performance series.") OR ("global government performance series."))*.