Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarians, bulgarien, vulgariae, bulgeriae
bulgeriae » bulgaricae, bulweria
bulgarian » hungarian, vulgarian, bulgerian
bulgar » vulgar, bulger
bulgarie » vulgarie, bulgerie, bulgarien, vulgaris, vulgare
bulgaria » vulgaria, bulgeria
bulgare » vulgare, bulgere, bulgarien, vulgares

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