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 » bulweria, bulgariae, bulgariia
bulgarica » bulgarisch, bulgarien, bulgarie, bulgareica, vulgarica, bulgerica
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 (bulgeria OR bulgarica)))) 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 (bulgeria OR bulgarica)))) or (bulgar or bulge))".
• Adding a wildcard symbol may retrieve word variants: (((bulgareiae or bulgarian) or (bulgarische or ((bulgaria or (bulgeria OR bulgarica)) or (bulgeria OR bulgarica)))) or (bulgar or bulge))*.