Perhaps you should try some spelling variations:
bulgariae » bulgarians, hungariae, bulgarin, vulgariae
bulgaricae » bulgarische, bulgarischen, bulgarischer, vulgaricae
bulgarian » hungarian, vulgarian
bulgarica » bulgarisch, vulgarica
bulgar » vulgar
bulgarie » vulgarie, vulgaris, vulgare
bulgarien » vulgarien, vulgarisn, vulgaren
bulgaria » vulgaria
bulgare » vulgare, vulgares
bulger » bulge, bulges

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