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

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