Perhaps you should try some spelling variations:
"level environmental performance series." » "local environmental performance series.", "global environmental performance series.", "rural environmental performance series.", "level environmental performance studies.", "level environmental performance size."
"legal government performance series." » "legal government performance studies.", "legal government performance size.", "local government performance series.", "level government performance series.", "liberal government performance series."

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