Perhaps you should try some spelling variations:
information sources » information resources, information services, information sciences
surface diffusion » state diffusion
sources surface » resources surface, surfaces surface, series surface
array arcing » array forming, array probing, array sharing
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 sources surface diffusion ((((array arcing) or (array string))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information sources surface diffusion ((((array arcing) OR (array string))) OR (array format)).
• Adding a wildcard symbol may retrieve word variants: information sources surface diffusion ((((array arcing) or (array string))) or (array format))*.