Perhaps you should try some spelling variations:
"right-wing extremity" » "right-wing extremists", "right-line extremity", "right-size extremity"
"right-wing extremist" » "right-wing extremists"
"right-wing extremism" » "right-wing extremismus", "right-wing extremes"

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: (((("right-wing extremism") OR ("right-wing extremity"))) OR ("right-wing extremist")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"right-wing extremism\") OR (\"right-wing extremity\"))) or (\"right-wing extremist\"))".
• Removing quotes may allow a broader search: (((( right-wing extremism ) OR ( right-wing extremity ))) or ( right-wing extremist )).
• Adding a wildcard symbol may retrieve word variants: (((("right-wing extremism") OR ("right-wing extremity"))) or ("right-wing extremist"))*.