החיפוש שביצעת - ((information documents) or (international documentation)) rural extension matched ring - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
international documentation » international cooperation, international communication, international convention
information documents » information documentation, information agents, information requirements
extension matched » extensions matched, extension method, extensions matching
matched ring » etched ring, branched ring, switched ring

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