Perhaps you should try some spelling variations:
complexity approximation » complex approximation, complexity applications, completeness approximation
approximation based » approximation a
based extensible » based extension, based extensions, based reversible
array sharing » arrays bearing, array imaging, way sharing
array string » array strong, arrays strings, array forming
array using » arrays using

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "complexity approximation based extensible ((array string) OR (((array using) OR (array sharing))))~".
• Adding a wildcard symbol may retrieve word variants: complexity approximation based extensible ((array string) OR (((array using) OR (array sharing))))*.