Perhaps you should try some spelling variations:
information spaces » information sources, information series, information services
2 dimensional » _ dimensional, 3 dimensional, two dimensional
array arcing » array forming, array probing, array sharing
array string » array strong, arrays strings, array sharing
spaces 2 » spaces _, spaces a, spaces 3

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 2 dimensional ((((array format) or (array arcing))) or (array string))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information spaces 2 dimensional ((((array format) OR (array arcing))) OR (array string)).
• Adding a wildcard symbol may retrieve word variants: information spaces 2 dimensional ((((array format) or (array arcing))) or (array string))*.