Perhaps you should try some spelling variations:
kur » kurz, kurs
kurt » kurzt, kurst, kurz
kurzt » kurzzt, kurszt, kurz, kurze, kuret
kurst » kurzst, kursst, kursat, kunst, hurst
kaur » kaum, kauf, kar

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 ((kurt OR kurzt) OR kurst)) OR kaufsse).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((kur or kaur) or ((kurt OR kurzt) or kurst)) or kaufsse)".
• Adding a wildcard symbol may retrieve word variants: (((kur or kaur) or ((kurt OR kurzt) or kurst)) or kaufsse)*.