Perhaps you should try some spelling variations:
information spaces » information sources, information series, information services
studies expression » studying expression, student expression, bodies expression
array processing » dairy processing, query processing
spaces studies » space studies, species studies, states studies
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 spaces studies expression ((array string) or (((array format) or (array processing))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information spaces studies expression ((array string) OR (((array format) OR (array processing)))).
• Adding a wildcard symbol may retrieve word variants: information spaces studies expression ((array string) or (((array format) or (array processing))))*.