Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
da filosofia » di filosofia, a filosofia, de filosofia
best das » best days, west das, test das
bist das » ist das, list das, geist das

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: ((best das) OR (bist das)) studium ((da filosofia) OR (la filosofia)) la literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((best das) or (bist das)) studium ((da filosofia) OR (la filosofia)) la literatura".
• Adding a wildcard symbol may retrieve word variants: ((best das) or (bist das)) studium ((da filosofia) OR (la filosofia)) la literatura*.