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

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