Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie
vulgarian » vulgaridad, bulgaria, hungarian
bulgarians » bulgariens, bulgaria, bulgarien, bulgarias, hungarians
bulgarian » bulgaria, hungarian
bulgarean » bulgaren, bulgaria, bulgarien
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: ((bulgariae OR (((vulgarian OR bulgarians) OR bulgarian) OR bulgarean)) OR (vulgare OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or (((vulgarian OR bulgarians) or bulgarian) or bulgarean)) or (vulgare or bulger))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (((vulgarian OR bulgarians) or bulgarian) or bulgarean)) or (vulgare or bulger))*.