Perhaps you should try some spelling variations:
information sources » information resources, information services, information sciences
using dimensions » using dimension, using dimensional, using dimensionless
array formulas » area formulas, harrop formulas, array format
array forming » array format, array fermi, array formats
array arcing » array probing, array sharing, array 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 sources using dimensions ((((array formulas) or (array arcing))) or (array forming))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information sources using dimensions ((((array formulas) OR (array arcing))) OR (array forming)).
• Adding a wildcard symbol may retrieve word variants: information sources using dimensions ((((array formulas) or (array arcing))) or (array forming))*.