Perhaps you should try some spelling variations:
involuntary sterilization » involuntary hospitalization
compulsory sterilization » compulsory hospitalization, voluntary sterilization, compulsory immunization
compulsory registration » compulsory arbitration

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: ((involuntary sterilization) OR (((compulsory sterilization) OR (compulsory registration)))) / law AND legislation / slovak.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((involuntary sterilization) or (((compulsory sterilization) OR (compulsory registration)))) / law and legislation / slovak".
• Adding a wildcard symbol may retrieve word variants: ((involuntary sterilization) or (((compulsory sterilization) OR (compulsory registration)))) / law and legislation / slovak*.