Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
equity scale » equity sale, equity style, equity share
filosofia da » filosofia de, filosofia del, filosofia e
studien dar » studien der, studien das, studien die
studien da » studien das, studien a, studien dd

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: "equity scale ((studien da) OR (studien dar)) filosofia da literatura".
• Adding a wildcard symbol may retrieve word variants: equity scale ((studien da) OR (studien dar)) filosofia da literatura*.