Perhaps you should try some spelling variations:
surface diffusion » state diffusion
information grid » information guide, information gain, information gis
array probing » arrays probing, assay probing, array profiling
grid surface » arid surface, gold surface, ground surface
array string » array strong, arrays strings, array sharing
array using » arrays using

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 grid surface diffusion ((array string) OR (((array using) OR (array probing))))~.
• Adding a wildcard symbol may retrieve word variants: information grid surface diffusion ((array string) or (((array using) or (array probing))))*.