Perhaps you should try some spelling variations:
computational concurrent » computation concurrent, computational concept, computational concerns
concurrent programming » constraint programming, concurrent programs
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.

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• If you are trying to use Boolean operators, they must be ALL CAPS: optimization computational concurrent programming ((array string) OR (array processing)).
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