Perhaps you should try some spelling variations:
bulgeriae » bulgariae, bulgaricae, bulgarie, bulgesiae
bulgarian » hungarian, bulgareian, bulgarieian
bulgaria » bulgareia, bulgarieia
bulgar » bulgare, bulgarie
bulger » 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: (((bulgeriae OR bulgarian) OR bulgaria) OR (((bulgar OR vulgar) OR bulge) OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgeriae OR bulgarian) or bulgaria) or (((bulgar or vulgar) or bulge) or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((bulgeriae OR bulgarian) or bulgaria) or (((bulgar or vulgar) or bulge) or bulger))*.