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 » des recherches
de recherches » des recherches, de recherche
modes cancer » models cancer, model cancer, nodes cancer
does cancer » nodes cancer, does cantor, echoes cancer
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: %recent results in cancer research%2c fortschritte der krebsforschung der%c3%a8s dans ((les recherches) OR (de recherches)) sur ((les cancer) OR (((does 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 ((les recherches) or (de recherches)) sur ((les cancer) or (((does 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 ((les recherches) or (de recherches)) sur ((les cancer) or (((does cancer) OR (modes cancer))))%22*.