Perhaps you should try some spelling variations:
models studies » model studies, modern studies, modeling studies
le literatura » de literatura, e literatura, de litteratura
la literatura » la litterature, a literature
roi models » roi model, coli models, loci models
studies la » studies lab, studies lca, studies lia

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: "roi models studies la filosofia ((le literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: roi models studies la filosofia ((le literatura) OR (la literatura))*.