Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
filosofia de » filosofia del
e filosofia » la filosofia
texto das » texto mas, texten das, texto de
studium e » studium _, studium 1, studium 3
text das » text des, text data, text der

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 das) OR (text das)) studium e filosofia de litterature".
• Adding a wildcard symbol may retrieve word variants: ((texto das) OR (text das)) studium e filosofia de litterature*.