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

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 central extending ((array imaging) or (((array string) or (array strong))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information a central extending ((array imaging) OR (((array string) OR (array strong)))).
• Adding a wildcard symbol may retrieve word variants: information a central extending ((array imaging) or (((array string) or (array strong))))*.