Perhaps you should try some spelling variations:
does filosofia » de filosofia, e filosofia, di filosofia
da literatura » la literatura, de literatura, na literatura
a literatura » la literatura, a literature, y literatura
sets scale » sets scaled, sets scales, set scale

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 scale study does filosofia ((da literatura) OR (a literatura))".
• Adding a wildcard symbol may retrieve word variants: sets scale study does filosofia ((da literatura) OR (a literatura))*.