Perhaps you should try some spelling variations:
surface expression » surface erosion
information a » information age
array forming » array format, array arcing, array fermi
array string » array strong, arrays strings, array sharing
array using » arrays using
a surface » sea 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 a surface expression ((array string) or (((array forming) or (array using))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information a surface expression ((array string) OR (((array forming) OR (array using)))).
• Adding a wildcard symbol may retrieve word variants: information a surface expression ((array string) or (((array forming) or (array using))))*.