Perhaps you should try some spelling variations:
"_ regulator perspectives" » "_ regulatory perspectives", "_ regulation perspectives", "_ regulatory perspective"
"a regulatory properties" » "a regularity properties", "a regular properties", "a regulatory perspectives"

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: (("_ regulator perspectives") OR ("a regulatory properties"))*.
• Removing quotes may allow a broader search: (( _ regulator perspectives ) or ( a regulatory properties ))*.