Perhaps you should try some spelling variations:
scale studie » scale studies, scale studien, scale study
de filosofia » di filosofia, la filosofia, a filosofia
y literatura » la literatura
e filosofia » la filosofia
best scale » bast scale, rest scale, burst scale

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 studie ((de filosofia) OR (e filosofia)) y literatura*.