Perhaps you should try some spelling variations:
le literatura » la literatura, de literatura, e literatura
filosofia le » filosofia de, filosofia e, filosofia del
coli models » cola models, color models, nli models
studies la » studies lab, studies lca, studies lia
roi model » roi models

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