Perhaps you should try some spelling variations:
kur » kurt, kurs
kursst » kurtsst, kurssst, kursat
kurz » kurtz, kursz
kurzer » kurtzer, kurszer
kaur » kaum, kauf, kar
kaursse » kaumsse, kaufsse, karsse

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: ((((kur OR kaur) OR kursst) OR (kurz OR kurzer)) OR kaursse)*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((kur OR kaur) or kursst) or (kurz or kurzer)) or kaursse)*".