Perhaps you should try some spelling variations:
"schriften des burgerlichen recht" » "schriften des burgerlichen rechts", "schriften des burgerliches recht"
"schriften dem burgerlichen recht" » "schriften dem burgerlichen rechts", "schriften dem burgerliches recht", "schriften der burgerlichen recht", "schriften beim burgerlichen recht", "schriften drei burgerlichen recht"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"schriften des burgerlichen recht\") OR (\"schriften dem burgerlichen recht\"))*".
• Removing quotes may allow a broader search: (( schriften des burgerlichen recht ) OR ( schriften dem burgerlichen recht ))*.