Perhaps you should try some spelling variations:
surface diffusion » state diffusion
array processing » dairy processing, query processing
information gis » information gain, information gaps, information grid
array string » array strong, arrays strings, array sharing
gis surface » gas surface, gibbs surface, axis surface
array fermi » array forming, array format

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: information gis surface diffusion ((array string) or (((array fermi) or (array processing))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information gis surface diffusion ((array string) OR (((array fermi) OR (array processing)))).
• Adding a wildcard symbol may retrieve word variants: information gis surface diffusion ((array string) or (((array fermi) or (array processing))))*.