Perhaps you should try some spelling variations:
surface diffusion » state diffusion
information gas » information gaps, information gap, information gis
array profiling » array processing, microarray profiling
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing
gas surface » its surface, trans 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 gas surface diffusion ((array string) or (((array arcing) or (array profiling))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information gas surface diffusion ((array string) OR (((array arcing) OR (array profiling)))).
• Adding a wildcard symbol may retrieve word variants: information gas surface diffusion ((array string) or (((array arcing) or (array profiling))))*.