Perhaps you should try some spelling variations:
stable student » table student, enable students, male student
scale student » late student, scale study, scale studies
filosofica da » filosofia da, filosofia de, filosofia di
da literatura » la literatura, a literatura, de literatura

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: "tests ((stable student) OR (scale student)) driven filosofica da literatura".
• Adding a wildcard symbol may retrieve word variants: tests ((stable student) OR (scale student)) driven filosofica da literatura*.