Perhaps you should try some spelling variations:
stable student » table student, enable students, male student
scale student » late student, scale study, scale studies
de literatura » de litterature, la literatura, y literatura
filosofia de » filosofia del
e filosofia » la filosofia

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: "less ((stable student) OR (scale student)) e filosofia de literatura".
• Adding a wildcard symbol may retrieve word variants: less ((stable student) OR (scale student)) e filosofia de literatura*.