Perhaps you should try some spelling variations:
rats sprachen » als sprachen, rats sprague, alte sprachen
studien des » studien der, studie des, studien aus
filologia a » filologia e, filologica e, filosofia da
studien de » studien der, studien die, studien dd

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: "rats sprachen ((studien de) OR (studien des)) filologia a literature".
• Adding a wildcard symbol may retrieve word variants: rats sprachen ((studien de) OR (studien des)) filologia a literature*.