Perhaps you should try some spelling variations:
"sociologist" » "sociological"
"sociologists" » "sociologicals", "sociological"
"radiologists" » "radiological"
"sociologia" » "sociological"

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: (("sociologist" OR (("sociologists" OR "radiologists") OR "biologists")) OR ("sociologia" OR "sociology")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"sociologist\" or ((\"sociologists\" OR \"radiologists\") or \"biologists\")) or (\"sociologia\" or \"sociology\"))".
• Removing quotes may allow a broader search: (( sociologist or (( sociologists OR radiologists ) or biologists )) or ( sociologia or sociology )).
• Adding a wildcard symbol may retrieve word variants: (("sociologist" or (("sociologists" OR "radiologists") or "biologists")) or ("sociologia" or "sociology"))*.