Perhaps you should try some spelling variations:
studies studies » studies study, studies services
erste studies » erste studie, erste studien, rate studies
e literatura » de literatura, y literatura, a literatura
e filosofia » la filosofia
literatura » literaturea
literatur » 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: "erste studies studies e filosofia ((e literatura) OR (e literatur))".
• Adding a wildcard symbol may retrieve word variants: erste studies studies e filosofia ((e literatura) OR (e literatur))*.