Perhaps you should try some spelling variations:
does filosofica » e filosofica, forma filosofica, poema filosofico
scales studies » scale studies, cases studies, scale studien
la literatura » la litterature, a literature
de filosofia » e filosofia, di filosofia, la filosofia
sets scales » sets scale, sets scaled, sets locales

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "sets scales studies ((does filosofica) OR (de filosofia)) la literatura".
• Adding a wildcard symbol may retrieve word variants: sets scales studies ((does filosofica) OR (de filosofia)) la literatura*.