Kittelson/Torstenson origin

I am trying to locate the origin of Hans Kittelson and Gunhild Torstenson. The information I have so far is from their obituaries but the names of the towns seems to be incorrect as I cannot locate them on google maps. Hans Kittelson DOB Sept. 2, 1840 in Boi Herra, Norway Gunhild Torstenson DOB April 16, 1848 in Schian, Norway Hans and Gunhild were married on April 12, 1869 and left for the US on April 15, 1869. They first settled in WI, then in 1873 moved to Dodge County, MN and in 1886 moved to Cransberg, SD. I am planning a trip to Norway in 2017 and would like to visit where they were from. Thank you!