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 » des recherches, de recherches
c fortschritte » 5 fortschritte, 2 fortschritte, 3 fortschritte
recherches sur » recherche sur
modes cancer » models cancer, model cancer, nodes cancer
does cancer » nodes cancer, does cantor, echoes cancer
les cancer » les cancers, lines cancer, cns cancer
bas dans » base dans, pas dans, bases dans
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) OR (c fortschritte)) der krebsforschung die%c3%((a8s dans) OR (bas dans)) les recherches sur ((les cancer) OR (((does cancer) OR (modes cancer))))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22recent results in cancer research%((2c fortschritte) or (c fortschritte)) der krebsforschung die%c3%((a8s dans) or (bas dans)) les recherches sur ((les cancer) or (((does cancer) OR (modes cancer))))%22".
• Adding a wildcard symbol may retrieve word variants: %22recent results in cancer research%((2c fortschritte) or (c fortschritte)) der krebsforschung die%c3%((a8s dans) or (bas dans)) les recherches sur ((les cancer) or (((does cancer) OR (modes cancer))))%22*.