Perhaps you should try some spelling variations:
sprachen studien » sprachsinn studien, sprachen die, rischen studien
de filologia » di filologia, de filosofia, e fisiologia
filologia a » filologia e, filologica e, filosofia da
studien de » studien der, studien die, studien des
rats » rate, rays

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (rats OR rat) sprachen studien de filologia a literature.
• Adding a wildcard symbol may retrieve word variants: (rats or rat) sprachen studien de filologia a literature*.