Perhaps you should try some spelling variations:
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische
bulgarie » bulgarien, bulgarian, vulgare, bulgareie, vulgarie
vulgaris » vulgar
bulgaria » bulgareia, vulgaria
bulgar » bulgare, vulgar
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 ((bulgaria OR bulgarie) OR vulgaris)) OR ((bulgar OR bulger) OR bulgere)).
• Adding a wildcard symbol may retrieve word variants: ((bulgarische or ((bulgaria or bulgarie) or vulgaris)) or ((bulgar or bulger) or bulgere))*.