"we have done thorough research into the subject" in German We have done thorough research into the subject. Wir haben zu dem Thema gründlich recherchiert. Detailed translations for "we have done thorough research into the subject" We have done thorough research into the subject. We have done thorough research into the subject.(also: We have thoroughly researched the subject.) Wir haben zu dem Thema gründlich recherchiert.