Perhaps you should try some spelling variations:
"peter unser lutherisches studien band 1" » "peter unser lutherischem spanien band 1" (Expand Search), "peter der lutherischen studien band 1" (Expand Search), "peter unser lutherisches studien und 1" (Expand Search), "peter unser lutherisches studien band i" (Expand Search)
"unter den lutherischen spanien band 2" » "unter den lutherischem spanien band 2" (Expand Search), "unter den lutherischen kolonien band 2" (Expand Search), "unter der lutherischen spanien band 2" (Expand Search), "unter evang lutherischen spanien band 2" (Expand Search), "unter den lutherischen spanien und 2" (Expand Search), "unter dem lutherischen spanien band 2" (Expand Search), "uber den lutherischen spanien band 2" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("peter unser lutherisches studien band 1") OR ("unter den lutherischen spanien band 2"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"peter unser lutherisches studien band 1\") OR (\"unter den lutherischen spanien band 2\"))*".
• Removing quotes may allow a broader search: (( peter unser lutherisches studien band 1 ) OR ( unter den lutherischen spanien band 2 ))*.