Perhaps you should try some spelling variations:
bulgaricae » bulgarica, bulgarische, bulgarian, bulgareicae, vulgaricae
bulgaria » bulgareia, vulgaria
bulgar » bulgare, vulgar
bulgarie » bulgareie, vulgarie, bulgarien, bulgarian, vulgaris
vulgare » vulgar, vulgaris, vulgarly
bulger » bulge, bulges

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: ((bulgaria OR bulgaricae) OR ((bulgar OR (bulgarie OR vulgare)) OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgaria or bulgaricae) or ((bulgar or (bulgarie or vulgare)) or bulger))*.