Perhaps you should try some spelling variations:
array processing » dairy processing, query processing
information sets » information set, information setc, information sheets
sets directed » self directed, dots directed, sets direct
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing

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: "information sets directed diffusion ((array string) OR (((array arcing) OR (array processing))))~".
• Adding a wildcard symbol may retrieve word variants: information sets directed diffusion ((array string) OR (((array arcing) OR (array processing))))*.