Perhaps you should try some spelling variations:
da litterature » la litterature, a litterature, a literature
de litterature » la litterature, et litterature
e filosofica » e filosofia, e filosofiche, a filosofia
test die » test de, west die, test drive
studie e » studie 2, studie _, studie 1
test do » test de, test d, test der

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 die) OR (test do)) studie e filosofica ((da litterature) OR (de litterature)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((test die) or (test do)) studie e filosofica ((da litterature) OR (de litterature))".
• Adding a wildcard symbol may retrieve word variants: ((test die) or (test do)) studie e filosofica ((da litterature) OR (de litterature))*.