החיפוש שביצעת - ((international cooperation) or (interpersonal communication)) set extension methods linda - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
extension methods » extraction methods, regression methods
set extension » set extensions, de extension, based extension
methods linda » methods linear, methods index, methods clinical
cooperation » operation

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