Perhaps you should try some spelling variations:
surface diffusion » state diffusion
information gain » information gap, information guide, information gathering
array sharing » arrays bearing, array imaging, way sharing
gain surface » grain surface, rain surface, brain surface
array string » array strong, arrays strings, array forming

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

• Performing a fuzzy search may retrieve terms with similar spellings: information gain surface diffusion ((((array string) OR (array sharing))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information gain surface diffusion ((((array string) OR (array sharing))) OR (array format)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "information gain surface diffusion ((((array string) OR (array sharing))) or (array format))".
• Adding a wildcard symbol may retrieve word variants: information gain surface diffusion ((((array string) OR (array sharing))) or (array format))*.