Perhaps you should try some spelling variations:
e letterature » e letteratura, et litterature, de litterature
besteht der » bestehen der, versteht der, steht der
filosofia e » filosofia de, filosofia del
beste der » besten der, beste oder, beste fur
studie y » studie 2, studie 1, studie 3

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: ((beste der) OR (besteht der)) ((studie y) OR (studie _)) filosofia e letterature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((beste der) OR (besteht der)) ((studie y) or (studie _)) filosofia e letterature".
• Adding a wildcard symbol may retrieve word variants: ((beste der) OR (besteht der)) ((studie y) or (studie _)) filosofia e letterature*.