Perhaps you should try some spelling variations:
"weak enforcement governance issues." » "weak efficient governance issues.", "weak empowerment governance issues.", "law enforcement governance issues.", "tax enforcement governance issues.", "_ enforcement governance issues."
"global environmental performance system." » "global environment performance system.", "global environmental performance states.", "global environmental performance sse3.", "global environmental performance instead."

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: (("weak enforcement governance issues.") or ("global environmental performance system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("weak enforcement governance issues.") OR ("global environmental performance system.")).
• Removing quotes may allow a broader search: (( weak enforcement governance issues. ) or ( global environmental performance system. )).
• Adding a wildcard symbol may retrieve word variants: (("weak enforcement governance issues.") or ("global environmental performance system."))*.