Perhaps you should try some spelling variations:
vulgariae » bulgariae, vulgarise, bulgaricae
bulgeriae » bulgariae, bulgaricae, bulgaria
bulgar » bulgare, vulgar, bulger
bulgarien » bulgareien, vulgarien, bulgerien, bulgarian, bulgaria

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: ((vulgariae OR bulgeriae) OR (bulgar OR bulgarien)).
• Adding a wildcard symbol may retrieve word variants: ((vulgariae or bulgeriae) or (bulgar or bulgarien))*.