Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
concepts extensions » concepts extension, concept's extension, concepts tensions
array processing » dairy processing, query processing
array imaging » arrays imaging, airway imaging, ray imaging

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• The words AND, OR and NOT may confuse the search; try adding quotes: "interpersonal communication concepts extensions ((array imaging) OR (array processing))~".
• Adding a wildcard symbol may retrieve word variants: interpersonal communication concepts extensions ((array imaging) OR (array processing))*.