Perhaps you should try some spelling variations:
"wortern transylvanica" » "worten transylvanica" (Expand Search), "wornern transylvanica" (Expand Search)
"worter transylvania" » "worte transylvania" (Expand Search), "worner transylvania" (Expand Search), "worter transilvania" (Expand Search), "worter transylvanie" (Expand Search)
"northern transylvania" » "northern transilvania" (Expand Search), "northern transylvanie" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("wortern transylvanica") OR ("worter transylvania"))) OR ("northern transylvania"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"wortern transylvanica\") OR (\"worter transylvania\"))) OR (\"northern transylvania\"))".
• Removing quotes may allow a broader search: (((( wortern transylvanica ) OR ( worter transylvania ))) OR ( northern transylvania )).
• Adding a wildcard symbol may retrieve word variants: (((("wortern transylvanica") OR ("worter transylvania"))) OR ("northern transylvania"))*.