Perhaps you should try some spelling variations:
die rationale » die rationalen, die nationale, die rationelle
die rational » die rationalen, die relationale, die rationelle
rationale du » nationale du, rationale drug, rationale der
rational du » national du, rational d, rational drug
du merite » de merite, d'un merite, que merite

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: (( die rational du merite ) OR ( die rationale du merite )).
• Adding a wildcard symbol may retrieve word variants: (( die rational du merite ) or ( die rationale du merite ))*.