Perhaps you should try some spelling variations:
surface diffusion » state diffusion
modeling surface » modelling surface, modifying surface, moving surface
array formulas » area formulas, harrop formulas, array format
array forming » array format, array arcing, array fermi
array string » array strong, arrays strings, array sharing

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: information modeling surface diffusion ((((array forming) or (array string))) or (array formulas))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information modeling surface diffusion ((((array forming) OR (array string))) OR (array formulas)).
• Adding a wildcard symbol may retrieve word variants: information modeling surface diffusion ((((array forming) or (array string))) or (array formulas))*.