Perhaps you should try some spelling variations:
information gis » information gain, information gaps, information grid
state diffusion » surface diffusion
array formats » array format, assay formats, array formulas
array probing » arrays probing, assay probing, array profiling
array using » arrays using
gis state » ppgis state

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 state diffusion ((((array using) OR (array formats))) OR (array probing))~.
• Adding a wildcard symbol may retrieve word variants: information gis state diffusion ((((array using) or (array formats))) or (array probing))*.