Perhaps you should try some spelling variations:
"legal investment performance series." » "legal government performance series.", "legal investment performance studies.", "legal investment performance size.", "real investment performance series.", "local investment performance series.", "global investment performance series."
"legal environmental performance series." » "legal environment performance series.", "legal environments performance series.", "local environmental performance series.", "legal environmental performance studies.", "legal environmental performance size."

Try widening your search to All Fields.

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

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