Perhaps you should try some spelling variations:
y literatura » la literatura
texto duale » texto durante
filologia y » filologia e, filologica e, filosofia y
studien dd » studien der, studien die, studien des
studies dd » studies ds, studies d, studies dn

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: "texto duale ((studien dd) OR (studies dd)) filologia y literatura".
• Adding a wildcard symbol may retrieve word variants: texto duale ((studien dd) OR (studies dd)) filologia y literatura*.