Could you let us in on some more background, where did you find Amalia Olsen, what is her relatioship with Johan Ericksen, what info are you seeking, etc?
Census enumerations in Minnesota show a John and Amalia Udstrand - but both were born in the 1860s Norway and his patronymic was Hansen rather than Eriksen.
Source: familysearch.org
Perhaps this small article giving advice about what information to include in an effective query might help the poster determine what additional information would be most helpful. http://www.rootsweb.ancestry.com/~wgnorway/good-queries.htm