Perhaps you should try some spelling variations:
control extensions » central extensions, central extension, control extending
array profiling » array processing, microarray profiling
information a » information age
array imaging » arrays imaging, airway imaging, ray imaging
array string » array strong, arrays strings, array sharing

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

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