Perhaps you should try some spelling variations:
krebsforschung und » krebsforschung _, krebsforschung die, praxisforschung und
22recent results » recent results, present results, recent result
2c fortschritte » 2 fortschritte, 23 fortschritte, 24 fortschritte
les recherches » des recherches, de recherches
recherches sur » recherche sur
does chapter » heroes chapter, does computer, does change
does cantor » does cancer, ross cantor, does control
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 und) OR (krebsforschung heute))%c3%a8s dans les recherches sur ((does cantor) OR (does chapter))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22recent results in cancer research%2c fortschritte der ((krebsforschung und) or (krebsforschung heute))%c3%a8s dans les recherches sur ((does cantor) OR (does chapter))%22".
• Adding a wildcard symbol may retrieve word variants: %22recent results in cancer research%2c fortschritte der ((krebsforschung und) or (krebsforschung heute))%c3%a8s dans les recherches sur ((does cantor) OR (does chapter))%22*.