Perhaps you should try some spelling variations:
surface expression » surface erosion
information flow » information from
array sharing » arrays bearing, array imaging, way sharing
flow surface » flows surface, flat surface, flux 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 flow surface expression ((((array sharing) or (array string))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information flow surface expression ((((array sharing) OR (array string))) OR (array format)).
• Adding a wildcard symbol may retrieve word variants: information flow surface expression ((((array sharing) or (array string))) or (array format))*.