החיפוש שביצעת - communication ((conversation vast) or (conversation based)) dimensional non trond* - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
conversation based » conversion based, conversation basic, conversation made
conversation vast » conversation part, conversation post, conversation basic
dimensional non » dimensional nmr
trond* » trend*, frond*, trong*

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