Try this
Dim expr As XPathExpression
expr = myXPathNavigator.Compile("//Search/Name | //Search/space")
Dim myXPathNodeIterator As XPathNodeIterator = myXPathNavigator.Select(expr)
While (myXPathNodeIterator.MoveNext())
Console.WriteLine("<" & myXPathNodeIterator.Current.Name & ">" & myXPathNodeIterator.Current.Value)
End While
Catch e As Exception
Console.WriteLine("Exception: {0}", e.ToString())
End Try