Perhaps you should try some spelling variations:
del litterature » de litterature, des litteratures, et litterature
texto scale » femto scale, texture scale, texto social
study di » study die, study d3, study diet
study de » study die, study der, study dem

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: texto scale ((((study di) OR (study de))) OR (study d)) filosofia del litterature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "texto scale ((((study di) OR (study de))) or (study d)) filosofia del litterature".
• Adding a wildcard symbol may retrieve word variants: texto scale ((((study di) OR (study de))) or (study d)) filosofia del litterature*.