Perhaps you should try some spelling variations:
e literatura » de literatura, y literatura, e literatur
burst scale » bast scale, best scale, just scale
studien aus » studie aus
filosofia e » filosofia de, filosofia del
studien es » studien bei, studien ein, studien als

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "burst scale ((studien es) OR (studien aus)) filosofia e literatura".
• Adding a wildcard symbol may retrieve word variants: burst scale ((studien es) OR (studien aus)) filosofia e literatura*.