Perhaps you should try some spelling variations:
le letterature » e letterature, la litterature, e letteratura
filosofia le » filosofia de, filosofia e, filosofia del
heute oder » heute der, beute oder, heute den
beste der » besten der, beste oder, besteht der
studie y » studie 2, studie _, studie 3
studie 1 » studie 2, studie _

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 (heute oder)) ((studie y) OR (studie 1)) filosofia le letterature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((beste der) or (heute oder)) ((studie y) OR (studie 1)) filosofia le letterature".
• Adding a wildcard symbol may retrieve word variants: ((beste der) or (heute oder)) ((studie y) OR (studie 1)) filosofia le letterature*.