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