Help Seeking Passenger Information

Greetings, all! We are encountering a great deal of difficulty locating passenger information for Anna or Anne Kristina Aanendatter Helland Hausken/Hauskje and children, after the death of her husband Ole Hanson Romshaug: Hans Olsen/Olson, Berthe, Marthe, Anna Olava, Aanen Owen, Andreas, Christopher, Anne Kristine Olsen/Olson, Ole Olsen/Olson Hausken, Zakius "Samuel" Olsen/Olson, Anna Maria, and Jorgen. We know they left Norway - according to a parish record - on April the 6th 1881. But that's where the trail seems to go cold. I have searched the Canadian records, Massachusetts Archives, as well as Ellis Island database. I cannot find them. Can someone help? We would be SO grateful!