החיפוש שביצעת - ((international conservation) or (interpersonal communication)) procedures decision concepts case* - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
international conservation » international cooperation, international consultation, international construction
procedures decision » processes decision, procedures design, procedures section
decision concepts » revision concepts, decision contexts, decisions contents
concepts case » concepts cases, concepts a, concepts chapter

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