The farm you are looking for is probably Bjoreim - located in Varhaug parish, Hå kommune (municipality) in Rogaland fylke (county) near Stavanger on the west coast of Norway. In the old days this municipality was called Varhaug herad and the county was called Stavanger amt.
For more links see my website "Ancestors from Norway" at
http://members.xoom.com/follesdalHappy hunting :-)
John Follesdal