Perhaps you should try some spelling variations:
der filosofica » de filosofia, e filosofia, di filosofia
ideas studien » ideas studies, das studien, deas studies
da literatura » la literatura, a literatura, de literatura
e filosofica » e filosofia, e filosofiche, a filosofia

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: "best ideas studien ((der filosofica) OR (e filosofica)) da literatura".
• Adding a wildcard symbol may retrieve word variants: best ideas studien ((der filosofica) OR (e filosofica)) da literatura*.