Perhaps you should try some spelling variations:
bulgaricae » bulgarica, bulgarische, bulgaria, vulgaricae, bulgariaicae, bulgarieicae
bulgareia » bulgaria, bulgariia, bulgarian, vulgareia, bulgariaeia, bulgarieeia, bulgarieia, bulgarienia
bulgariaeia » bulgariae, bulgariia, vulgariaeia, bulgariaiaeia, bulgarieiaeia
bulgar » vulgar, bulgaria, bulgarie
bulgare » vulgare, bulgariae, bulgariee, bulgarie, bulgarien
bulger » bulge, bulges
bulgere » bulgee, bulgese, bilgere, burgere, bulgarie

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• Removing quotes may allow a broader search: ((bulgaricae or (bulgareia or bulgariaeia)) or (((bulgar OR bulgare) or bulger) or bulgere)).