Acho que você não preenche as condições para um visto de entrada multilíngüe. Do Ministério de Relações Exteriores da Bulgária
A multiple visa with a validity term of up to one year may be issued to a foreigner provided he/she has obtained a short-stay visa in the preceding year and it was used in compliance with the legal provisions for entry and stay in the Republic of Bulgaria and there are grounds to apply for a multiple entry visa.
A multiple short - stay visa may be issued to a foreigner who meets any of the conditions below :
- Maintains lasting business contacts with Bulgarian natural or legal persons engaging in business in the meaning of the Commerce Act;
- maintains lasting business contacts with Bulgarian legal persons engaging in business in the meaning of the Non - Profit Legal Persons Act;
- maintains lasting business contacts with representation offices of foreign legal persons registered pursuant to article 24 of the Investment Promotion Act;
- has substantial pers onal contribution to the development of bilateral relations with the Republic of Bulgaria;
- is a member of the family of a Bulgarian citizen in the meaning of the Foreigners in the Republic of Bulgaria Act;
- is a member of the family of a citizen of a Europe an Union member - state, of the European Economic Area or of the Swiss Confederation residing permanently in the Republic of Bulgaria;
- is a member of the family of a foreigner residing permanently in the Republic of Bulgaria keeping his/her customary residence abroad;
- is a driver of international road transport or a member of a crew of railway transport for passengers and goods.