Based on a decree (No 17/2019/ NĐ-CP) approved by the Vietnamese government (officially went into effect on 1st February 2019), all 15 CEE countries are now allowed to enter Vietnam on e-visa.
Visa applicants must register through the official website https://evisa.xuatnhapcanh.gov.vn/ and fill in the required information. The payment of 25 USD has to be done online too. The application is processed within 3 working days. The printed copy is needed to enter Vietnam.
E-visas are limited to one entry and valid for a maximum duration of 30 days. Both, tourists and business visa can be applied as e-visa.