Perhaps you should try some spelling variations:
krebsforschung der » krebsforschung uber, krebsforschung die, krebsforschung das
22recent results » recent results, present results, recent result
2c fortschritte » 2 fortschritte, 23 fortschritte, c fortschritte
les recherches » des recherches
de recherches » des recherches, de recherche
les cancer » les cancers, lines cancer, does cancer
a8s dans » ames dans, bas dans, dus dans

Try widening your search to All Fields.

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