Perhaps you should try some spelling variations:
filosofica da » filosofia da, filosofia de, filosofia di
da literatura » la literatura, a literatura, de literatura
burst scale » bast scale, best scale, just scale
studien di » studien die, studien der, studien bei
studien dd » studies dd, studien der, studien die

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: burst scale ((studien di) OR (studien dd)) filosofica da literatura*.