Perhaps you should try some spelling variations:
communication function » communication functions, communication foundation, communicative functions
based extension » based extraction
array arcing » array forming, array probing, array sharing
array string » array strong, arrays strings, array sharing
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 function based extension ((((array arcing) or (array string))) or (arrays a))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication function based extension ((((array arcing) OR (array string))) OR (arrays a)).
• Adding a wildcard symbol may retrieve word variants: communication function based extension ((((array arcing) or (array string))) or (arrays a))*.