there are several ways you can find groups of specific countries
1) create an account and add some swiss friends after they accept you can view their about section to find out the groups they have joined
2)if you are using swiss IP try to find out some groups yourself and send request later FB will start suggesting groups.
3)this is the best method i used to discover groups. just type a city name into search box and filter for groups. u will get groups starts with the city name.try this for all major cities.
6)using a keyword like online shopping, business, fun etc etc