Perhaps you should try some spelling variations:
krebsforschung der » krebsforschung uber, krebsforschung die, krebsforschung das
24 fortschritte » 2 fortschritte, 23 fortschritte, 25 fortschritte
2c fortschritte » 2 fortschritte, 23 fortschritte, 25 fortschritte
les recherches » des recherches
de recherches » des recherches, de recherche
modes cancer » models cancer, model cancer, nodes cancer
does cancer » nodes cancer, does cantor, echoes cancer
arts dans » art dans, arts dance, faits dans
a8s dans » ans dans, ames dans, ils dans

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: %recent results in cancer research%((2c fortschritte) OR (24 fortschritte)) der krebsforschung der%c3%((a8s dans) OR (arts dans)) ((les recherches) OR (de recherches)) sur ((does cancer) OR (modes cancer))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%recent results in cancer research%((2c fortschritte) or (24 fortschritte)) der krebsforschung der%c3%((a8s dans) or (arts dans)) ((les recherches) OR (de recherches)) sur ((does cancer) or (modes cancer))%22".
• Adding a wildcard symbol may retrieve word variants: %recent results in cancer research%((2c fortschritte) or (24 fortschritte)) der krebsforschung der%c3%((a8s dans) or (arts dans)) ((les recherches) OR (de recherches)) sur ((does cancer) or (modes cancer))%22*.