Perhaps you should try some spelling variations:
krebsforschung die » krebsforschung _, krebsforschung und, krebsforschung heute
22recent results » recent results, present results, recent result
2c fortschritte » 2 fortschritte, 23 fortschritte, 24 fortschritte
les recherches » de recherches
does cancer » modes cancer, nodes cancer, does cantor
les cancer » les cancers, lines cancer, gets cancer
a8s dans » ans dans, arts dans, ames 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 die%c3%a8s dans ((les recherches) OR (des recherches)) sur ((((les cancer) OR (does cancer))) OR (((les cancer) OR (does cancer))s))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22recent results in cancer research%2c fortschritte der krebsforschung die%c3%a8s dans ((les recherches) OR (des recherches)) sur ((((les cancer) or (does cancer))) or (((les cancer) or (does cancer))s))%22".
• Adding a wildcard symbol may retrieve word variants: %22recent results in cancer research%2c fortschritte der krebsforschung die%c3%a8s dans ((les recherches) OR (des recherches)) sur ((((les cancer) or (does cancer))) or (((les cancer) or (does cancer))s))%22*.