Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
tests space » test space, texts space, lists space
studien des » studien der, studien aus, studien die
studie des » studie der, studium des, studie die

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: "tests space ((studien des) OR (studie des)) filosofia la literatura".
• Adding a wildcard symbol may retrieve word variants: tests space ((studien des) OR (studie des)) filosofia la literatura*.