Tags Thi Anh Dao Dentsu's full-service agency Isobar supplants VN acquisition Emerald Tuesday, Apr 19, 2016 Full-service digital marketing agency Isobar has opened an office in Viet Nam to supplant Emerald, which was acquired last year by its parent Dentsu Aegis Network. VN firms wary of higher stakes for foreign investors Thursday, Jun 19, 2014 Firms were eager for the long-awaited proposal to increase foreign stakes in listed companies, but some were cautious over unexpected acquisitions.