Perhaps you should try some spelling variations:
surface diffusion » state diffusion
information gis » information gain, information gaps, information grid
array formulas » area formulas, harrop formulas, array formats
array arcing » array forming, array probing, array sharing
gis surface » gas surface, gibbs surface, axis 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 gis surface diffusion ((array arcing) OR (((array formulas) OR (array format))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information gis surface diffusion ((array arcing) OR (((array formulas) OR (array format))))".
• Adding a wildcard symbol may retrieve word variants: information gis surface diffusion ((array arcing) OR (((array formulas) OR (array format))))*.