Perhaps you should try some spelling variations:
regulators properties » regular properties, regulated properties, regulating properties
regulatory properties » regularity properties, regular properties, regulatory perspectives
key regulators » key regulator, _ regulators
3 regulatory » 3 regulation

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: (( key regulators properties ) OR ( 3 regulatory properties ))*.