Perhaps you should try some spelling variations:
communication concept's » communication concepts, communications concepts, communication conceptual
concept's extension » concepts extension, converters extension, concepts tensions
array processing » dairy processing, query processing
array probing » arrays probing, assay probing, array profiling

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

• Performing a fuzzy search may retrieve terms with similar spellings: interpersonal communication concept's extension ((array probing) or (array processing))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: interpersonal communication concept's extension ((array probing) OR (array processing)).
• Adding a wildcard symbol may retrieve word variants: interpersonal communication concept's extension ((array probing) or (array processing))*.