Restrict/limit search to multiple countries

Hello

In My Maps Location ist is possible to restict serach to one country:

Restrict search to a country(ISO Code)


I need to restrict to two ore more countries.
It would be great to enter there country codes like:

CH,DE,FR

I believe others could use this as well, because if they have have addresses in few countries only, it does not make sense to search world wide.

Thank you very much.

Best regards
Patrick