Perhaps you should try some spelling variations:
da literatura » a literatura, de literatura, na literatura
la literatura » la litterature, a literature
studies die » studien die, studies does, studies dose
best scale » bast scale, rest scale, burst scale
studie die » studie 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: best scale ((studies die) OR (studie die)) filosofica ((da literatura) OR (la literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "best scale ((studies die) or (studie die)) filosofica ((da literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: best scale ((studies die) or (studie die)) filosofica ((da literatura) OR (la literatura))*.