Perhaps you should try some spelling variations:
bulgarische » bulgarischen, ungarische
bulgareia » bulgariia, bulgarian, bulgarica, vulgareia, bulgarienia, vulgaresia
bulgare » vulgare, bulgarien, vulgares
bulgarie » bulgarien, bulgarian, vulgaris
bulgere » bulger, burgere, bulgares
bilgere » bilger, bilgeri, billigere

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 ((bulgareia OR bulgare) OR bulgarie)) OR ((bulgaria OR bulge) OR (bulgere OR bilgere))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgarische or ((bulgareia OR bulgare) or bulgarie)) or ((bulgaria or bulge) or (bulgere or bilgere)))".
• Adding a wildcard symbol may retrieve word variants: ((bulgarische or ((bulgareia OR bulgare) or bulgarie)) or ((bulgaria or bulge) or (bulgere or bilgere)))*.