Perhaps you should try some spelling variations:
la litterature » a literature
la literatura » a literature
am filosofia » a filosofia, em filosofia, la filosofia
de studium » dem studium, des studium, d studium
studium am » studium im, studium als, studium das

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: "est de studium am filosofia ((la literatura) OR (la litterature))".
• Adding a wildcard symbol may retrieve word variants: est de studium am filosofia ((la literatura) OR (la litterature))*.