Perhaps you should try some spelling variations:
zu recherche » ou recherche, ou recherches, fur recherche
les rapport » les rapports, le rapport, ses rapport
rapport zu » rapport du, rapport au, rapport lu
fait » fast, fact, fair

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: les rapport zu recherche ((du fit) OR (du fait)).
• Adding a wildcard symbol may retrieve word variants: les rapport zu recherche ((du fit) or (du fait))*.