Perhaps you should try some spelling variations:
"administrative functions" » "administrative region", "administrative agencies", "administrative acts"
"administrative decisions" » "administration decision", "administrative region", "administrative access"

Try widening your search to All Fields.

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: (("administrative functions") OR ("administrative decisions")).
• Removing quotes may allow a broader search: (( administrative functions ) or ( administrative decisions )).
• Adding a wildcard symbol may retrieve word variants: (("administrative functions") or ("administrative decisions"))*.