Perhaps you should try some spelling variations:
sources expression » series expression, sources explosion, studies expression
information age » information storage
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing
age sources » ae sources, case sources, date sources
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: information age sources expression ((array string) or (((array arcing) or (array using))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information age sources expression ((array string) OR (((array arcing) OR (array using)))).
• Adding a wildcard symbol may retrieve word variants: information age sources expression ((array string) or (((array arcing) or (array using))))*.