Perhaps you should try some spelling variations:
la litterature » a literature
la literatura » a literature
der filosofia » de filosofia, e filosofia, di filosofia
test ideal » test ideals, test ideas, best ideas
test idea » test ideas, best ideas, test index
study der » study deep, study dark, study demo

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: ((test ideal) OR (test idea)) study der filosofia ((la literatura) OR (la litterature)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((test ideal) or (test idea)) study der filosofia ((la literatura) OR (la litterature))".
• Adding a wildcard symbol may retrieve word variants: ((test ideal) or (test idea)) study der filosofia ((la literatura) OR (la litterature))*.