Perhaps you should try some spelling variations:
bulgariae » bulgarians, bulgarien, bulgare, bulgareiae, vulgariae
bulgarie » bulgarien, vulgaris, vulgare, bulgareie, vulgarie
bulgaricae » bulgarica, bulgarischen, bulgarischer, bulgareicae, vulgaricae
bulgarian » hungarian, bulgareian, vulgarian
bulgarisch » bulgarischen, bulgareisch, vulgarisch
bulgarische » bulgarischene, bulgarischen, ungarische, bulgareische, vulgarische
bulgaria » bulgareia, vulgaria
bulgar » bulgare, vulgar
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 bulgarie) OR bulgaria) OR (bulgaricae OR (bulgarian OR (bulgarisch OR bulgarische)))) OR (bulgar OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((bulgariae or bulgarie) or bulgaria) or (bulgaricae or (bulgarian or (bulgarisch OR bulgarische)))) or (bulgar or bulger))".
• Adding a wildcard symbol may retrieve word variants: ((((bulgariae or bulgarie) or bulgaria) or (bulgaricae or (bulgarian or (bulgarisch OR bulgarische)))) or (bulgar or bulger))*.