Perhaps you should try some spelling variations:
bulgarische » bulgarischen, ungarische, bulgareische, bulgariaische, bulgarieische
bulgariaeia » bulgariae, bulgariia, bulgareiaeia, bulgariaiaeia, bulgarieiaeia
bulgar » bulgare, bulgaria, bulgarie
bulger » bulge, bulges
bulgere » bulgee, bulgese, bulgare, bilgere, burgere

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: ((bulgarische OR (bulgariaeia OR vulgar)) OR ((bulgar OR bulger) OR bulgere)).
• Adding a wildcard symbol may retrieve word variants: ((bulgarische or (bulgariaeia or vulgar)) or ((bulgar or bulger) or bulgere))*.