Perhaps you should try some spelling variations:
bulgaricae » bulgarica, bulgarische, bulgarian, bulgareicae, vulgaricae, bulgarieicae
vulgaria » vulgaris, vulgari, vulvaria
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
bulger » bulge, bulges
bulgere » bulgee, bulgese, bulgare, bilgere, bulgarie
burgere » burger, burgerl, burgerij

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: ((bulgaricae OR (bulgaria OR vulgaria)) OR ((bulgar OR bulger) OR (bulgere OR burgere))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgaricae or (bulgaria or vulgaria)) or ((bulgar or bulger) or (bulgere OR burgere)))".
• Adding a wildcard symbol may retrieve word variants: ((bulgaricae or (bulgaria or vulgaria)) or ((bulgar or bulger) or (bulgere OR burgere)))*.