Perhaps you should try some spelling variations:
"legal environment performance series." » "legal environmental performances series.", "legal government performance series.", "legal investment performance series.", "legal environment performance studies.", "legal environment performance size.", "global environment performance series."
"global environmental performance risks." » "global environment performance risks.", "global environmental performance risk."

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

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