Perhaps you should try some spelling variations:
idealen studium » duales studium, duale studium
dualen studium » duales studium, duale studium
ds filosofica » di filosofia, de filosofia, da filosofia
filosofica la » filosofica da, filosofia la, filosofia da
la literatura » la litterature, a literature

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: "des ((idealen studium) OR (dualen studium)) ds filosofica la literatura".
• Adding a wildcard symbol may retrieve word variants: des ((idealen studium) OR (dualen studium)) ds filosofica la literatura*.