Perhaps you should try some spelling variations:
bulgariae » bulgarie, bulgarians, bulgare, bulgareiae, vulgariae, bulgeriae
bulgarian » hungarian, bulgareian, vulgarian, bulgerian
bulgaricae » bulgarica, bulgarische, bulgarie, bulgareicae, vulgaricae, bulgericae
bulgarien » bulgareien, vulgarien, bulgerien
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger

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: ((((bulgariae OR bulgarien) OR bulgarian) OR (bulgaricae OR bulgaria)) OR (bulgar OR bulge)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((bulgariae OR bulgarien) or bulgarian) or (bulgaricae or bulgaria)) or (bulgar or bulge))".
• Adding a wildcard symbol may retrieve word variants: ((((bulgariae OR bulgarien) or bulgarian) or (bulgaricae or bulgaria)) or (bulgar or bulge))*.