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

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 ((de filosofia) OR (di filosofia)) la literatura.
• Adding a wildcard symbol may retrieve word variants: tests table studien ((de filosofia) or (di filosofia)) la literatura*.