Perhaps you should try some spelling variations:
surface diffusion » state diffusion
information grid » information guide, information gain, information gis
grid surface » arid surface, gold surface, ground surface
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing
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 grid surface diffusion ((array string) or (((array fermi) or (array arcing))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information grid surface diffusion ((array string) OR (((array fermi) OR (array arcing)))).
• Adding a wildcard symbol may retrieve word variants: information grid surface diffusion ((array string) or (((array fermi) or (array arcing))))*.