Perhaps you should try some spelling variations:
krebsforschung der » krebsforschung uber, krebsforschung die, krebsforschung das
2c fortschritte » 2 fortschritte, 23 fortschritte, 24 fortschritte
les recherches » de recherches
modes cancer » models cancer, model cancer, modern cancer
nodes cancer » node cancer, nodel cancer, models cancer
does cancer » does cantor, echoes cancer, does chapter
a8s dans » arts 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: %recent results in cancer research%2c fortschritte der krebsforschung der%c3%((a8s dans) OR (ans dans)) ((les recherches) OR (des recherches)) sur ((((does cancer) OR (nodes cancer))) OR (modes cancer))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%recent results in cancer research%2c fortschritte der krebsforschung der%c3%((a8s dans) or (ans dans)) ((les recherches) or (des recherches)) sur ((((does cancer) OR (nodes cancer))) or (modes cancer))%22".
• Adding a wildcard symbol may retrieve word variants: %recent results in cancer research%2c fortschritte der krebsforschung der%c3%((a8s dans) or (ans dans)) ((les recherches) or (des recherches)) sur ((((does cancer) OR (nodes cancer))) or (modes cancer))%22*.