Perhaps you should try some spelling variations:
la litterature » a literature
des filosofica » de filosofia, e filosofica, e filosofia
table studien » table studies, table student, cable studies
de literatura » de litterature, la literatura, y literatura
tests table » test tables, results table, test suitable
studien des » studien der, studie des, studien aus

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tests table studien des filosofica ((de literatura) OR (la litterature)).
• Adding a wildcard symbol may retrieve word variants: tests table studien des filosofica ((de literatura) or (la litterature))*.