Perhaps you should try some spelling variations:
communication relations » communication relational, communication relating, communications regulations
basic dimensions » based dimension, pacific dimensions, design dimensions
relations basic » relations basing, relations asia, relations based
array paving » array planning, array imaging, array probing
array ang » arrays ang, array along, array range
arrays a » arrays _

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: communication relations basic dimensions ((((array ang) or (array paving))) or (arrays a))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication relations basic dimensions ((((array ang) OR (array paving))) OR (arrays a)).
• Adding a wildcard symbol may retrieve word variants: communication relations basic dimensions ((((array ang) or (array paving))) or (arrays a))*.