Perhaps you should try some spelling variations:
communications regulators » communications regulations, communications regulation, communications sectors
regulators basic » regulators based, regulators cosmic, regulation basic
basic dimensions » based dimension, pacific dimensions, design dimensions
array arcing » array forming, array probing, array sharing
array ang » arrays ang, array along, array range
arrays a » arrays _

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: communications regulators basic dimensions ((((array ang) OR (array arcing))) OR (arrays a))~.
• Adding a wildcard symbol may retrieve word variants: communications regulators basic dimensions ((((array ang) or (array arcing))) or (arrays a))*.