Perhaps you should try some spelling variations:
concurrent programming » constraint programming, concurrent programs
operations concurrent » operations current, permutations concurrent, operation current
functions operations » function operators, functions relations, functions interactions
array processing » dairy processing, query processing
array string » array strong, arrays strings, array sharing

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

• If you are trying to use Boolean operators, they must be ALL CAPS: functions operations concurrent programming ((array string) OR (array processing))~.
• Adding a wildcard symbol may retrieve word variants: functions operations concurrent programming ((array string) or (array processing))*.