Perhaps you should try some spelling variations:
bulgareiae » bulgariae, bulgarie, bulgaricae, bulgareeiae, vulgareiae, bulgereiae
bulgarian » hungarian, bulgareian, vulgarian, bulgerian
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgerische
bulgeria » bulgariae, bulgariia, bullgaria
bulgarica » bulgarisch, bulgarien, bulgarie, bulgareica, vulgarica, bulgerica
bulweria » bulwerii, bulwer, guleria
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger

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: (((bulgareiae OR bulgarian) OR (bulgarische OR (bulgaria OR ((bulgeria OR bulgarica) OR bulweria)))) OR (bulgar OR bulge)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgareiae or bulgarian) or (bulgarische or (bulgaria or ((bulgeria OR bulgarica) or bulweria)))) or (bulgar or bulge))".
• Adding a wildcard symbol may retrieve word variants: (((bulgareiae or bulgarian) or (bulgarische or (bulgaria or ((bulgeria OR bulgarica) or bulweria)))) or (bulgar or bulge))*.