Perhaps you should try some spelling variations:
bulgareica » bulgarica, bulgaria, bulgaricae, vulgareica, bulgariaeica, bulgarieeica, bulgarieica, bulgarienica
bulgariia » bulgaria, bulgarica, bulgaricae, vulgariia, bulgariaiia, bulgarieiia
bulgar » vulgar, bulgaria, bulgarie
bulgare » vulgare, bulgariae, bulgariee, bulgarie, bulgarien
bulger » bulge, bulges
bulgere » bulgee, bulgese, burgere, bulgarie, bulgares
bilgere » bilger, bilgeri, billigere

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• Removing quotes may allow a broader search: ((bulgareica or bulgariia) or (((bulgar OR bulgare) or bulger) or (bulgere or bilgere))).