Perhaps you should try some spelling variations:
"global environment governance series." » "global environmental governance series.", "global evironmental governance series.", "global environment government series.", "global environment governance system."
"global international covenant series." » "global international conventions series.", "global international consultant series.", "global international credit series.", "legal international covenant series.", "regional international covenant series.", "general international covenant series.", "global international movements series."

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

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