Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
based dimensioning » based dimension, based dimensions, fast dimensioning
concepts based » concept based, concepts cases, concepts case
array range » ray range
rake angles » rake angle, large angles, grain angles
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: communication concepts based dimensioning ((((array range) OR (rake angles))) OR (arrays a))~.
• Adding a wildcard symbol may retrieve word variants: communication concepts based dimensioning ((((array range) or (rake angles))) or (arrays a))*.