Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarie, bulgarians, bulgareiae, vulgariae, bulgeriae
bulgareischen » bulgarischen, bulgarische, bulgarischer, bulgareeischen, vulgareischen, bulgereischen
bulgarian » hungarian, bulgareian, vulgarian, bulgerian
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger
vulgariee » vulgarisee, vulgarise, vulgarises

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: ((bulgariae OR (bulgareischen OR (bulgarian OR bulgaria))) OR ((bulgar OR vulgariee) OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgareischen or (bulgarian or bulgaria))) or ((bulgar or vulgariee) or bulge))*.