Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
scale studies » scale study
dd filosofia » di filosofia, da filosofia, la filosofia
de filosofia » e filosofia, di filosofia, la filosofia
sets scale » sets scaled, sets scales, set scale

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: sets scale studies ((dd filosofia) OR (de filosofia)) la literatura.
• Adding a wildcard symbol may retrieve word variants: sets scale studies ((dd filosofia) or (de filosofia)) la literatura*.