Perhaps you should try some spelling variations:
communication first » communications first, communication fast, communication format
first extensor » first extension, first extensive, forest extension
array sharing » arrays bearing, array imaging, way sharing
array string » array strong, arrays strings, array forming
array using » arrays using

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication communication first extensor ((((array using) or (array sharing))) or (array string))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication communication first extensor ((((array using) OR (array sharing))) OR (array string)).
• Adding a wildcard symbol may retrieve word variants: communication communication first extensor ((((array using) or (array sharing))) or (array string))*.