Perhaps you should try some spelling variations:
surface diffusion » state diffusion
information gis » information gain, information gaps, information grid
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing
gis surface » gas surface, gibbs surface, axis surface
arrays long » arrays ang, arrays load, array along

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

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