Perhaps you should try some spelling variations:
"northern transilvania" » "northern transylvanica" (Expand Search), "northern transylvanie" (Expand Search), "northern transsilvanien" (Expand Search)
"wortern transylvania" » "wortern transylvanica" (Expand Search), "wortern transylvanie" (Expand Search), "worten transylvania" (Expand Search), "wornern transylvania" (Expand Search)
"worter transylvania" » "worter transylvanica" (Expand Search), "worter transylvanie" (Expand Search), "worte transylvania" (Expand Search), "worner transylvania" (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: (("northern transilvania") OR ((("wortern transylvania") OR ("worter transylvania"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"northern transilvania\") OR (((\"wortern transylvania\") OR (\"worter transylvania\"))))*".
• Removing quotes may allow a broader search: (( northern transilvania ) OR ((( wortern transylvania ) OR ( worter transylvania ))))*.