Perhaps you should try some spelling variations:
la litterature » a literature
based studies » based study
la literatura » a literature
assets based » asset based, sets based, assays based
de filosofia » e filosofia, di filosofia, la filosofia
studies de » studies der, studies die, studies doe

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: assets based studies de filosofia ((la literatura) OR (la litterature))*.