Perhaps you should try some spelling variations:
"weak enforcement governance series." » "weak efficient governance series.", "law enforcement governance series.", "tax enforcement governance series.", "_ enforcement governance series."
"global empowerment governance system." » "global empowerment guidance system.", "global endowments governance system.", "local empowerment governance system.", "legal empowerment governance system.", "social empowerment governance system."

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: (("weak enforcement governance series.") OR ("global empowerment governance system."))~.
• Removing quotes may allow a broader search: (( weak enforcement governance series. ) or ( global empowerment governance system. ))~.
• Adding a wildcard symbol may retrieve word variants: (("weak enforcement governance series.") or ("global empowerment governance system."))*.