Perhaps you should try some spelling variations:
"studie politica linguistica" » "studie politica statistica", "studies political linguistica", "studies politics linguistica", "saude politica linguistica"
"studie dominica statistical" » "studie mining statistical", "studie guinea statistical"

Try widening your search to All Fields.

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: (("studie politica linguistica") OR ("studie dominica statistical")).
• Removing quotes may allow a broader search: (( studie politica linguistica ) or ( studie dominica statistical )).
• Adding a wildcard symbol may retrieve word variants: (("studie politica linguistica") or ("studie dominica statistical"))*.