Perhaps you should try some spelling variations:
virus expressing » cells expressing
array sharing » arrays bearing, array imaging, way sharing
array string » array strong, arrays strings, array forming
array arcing » array forming, array probing, array using
based virus » based versus, based viral, based virtual

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

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