Nyhus and Kragstad

Gulleck Nyhus b 7 Sep 1833 died in Minnesota on 10 Oct 1894. Kjersti Kragstad b 22 Jun 1835 died in Minnesota on 11 Jan 1916. I believe they emigrated about 1872 with 2 children, Jens b abt 1871 and Guttorm b abt 1873. I'd like to know where they were from. I've looked for both farms and found a lot. Please help me look!