Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
equity scale » equity share, equity style, equity small
equity sale » equity share, equity style, equity small
5 filosofia » e filosofia, a filosofia, y filosofia
studien 5 » studien _, studien 3, studien 4

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: ((equity scale) OR (equity sale)) studien 5 filosofia del literatura.
• Adding a wildcard symbol may retrieve word variants: ((equity scale) or (equity sale)) studien 5 filosofia del literatura*.