Perhaps you should try some spelling variations:
communication content » communication concepts, communication control, communication conflict
based dimensioning » based dimension, based dimensions, fast dimensioning
rake angle » rake angles, range angle, ray angle
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 content based dimensioning ((((array ang) or (rake angle))) or (arrays a))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication content based dimensioning ((((array ang) OR (rake angle))) OR (arrays a)).
• Adding a wildcard symbol may retrieve word variants: communication content based dimensioning ((((array ang) or (rake angle))) or (arrays a))*.