Perhaps you should try some spelling variations:
del letterature » de litterature, e letterature, le letterature
beste oder » beste der, werte oder, heute oder
beute oder » heute oder, werte oder, akute oder
studie y » studie _, 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 oder) OR (beute oder)) ((studie y) OR (studie 2)) filosofia del letterature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((beste oder) OR (beute oder)) ((studie y) or (studie 2)) filosofia del letterature".
• Adding a wildcard symbol may retrieve word variants: ((beste oder) OR (beute oder)) ((studie y) or (studie 2)) filosofia del letterature*.