Perhaps you should try some spelling variations:
"law environmental governance system." » "law environmental performance system.", "low environmental governance system.", "how environmental governance system.", "new environmental governance system."
"weak enforcement governance system." » "weak efficient governance system.", "weak empowerment governance system.", "law enforcement governance system.", "tax enforcement governance system.", "_ enforcement governance system."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("weak enforcement governance system.") or ("law environmental governance system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("weak enforcement governance system.") OR ("law environmental governance system."))*.
• Removing quotes may allow a broader search: (( weak enforcement governance system. ) or ( law environmental governance system. ))*.