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 imaging » arrays imaging, airway imaging, ray imaging
array probing » arrays probing, assay probing, array protein
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 imaging) or (array probing))) or (array profiling))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information gas surface diffusion ((((array imaging) OR (array probing))) OR (array profiling)).
• Adding a wildcard symbol may retrieve word variants: information gas surface diffusion ((((array imaging) or (array probing))) or (array profiling))*.