Perhaps you should try some spelling variations:
krebsforschung der » krebsforschung uber, krebsforschung die, krebsforschung das
2c fortschritte » 2 fortschritte, 23 fortschritte, 24 fortschritte
leur recherche » leurs recherches, der recherche, zur recherche
les recherche » les recherches, des recherches, de recherche
modes cancer » models cancer, model cancer, nodes cancer
does cancer » nodes cancer, does cantor, echoes 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 recherche) OR (leur recherche)) sur ((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 recherche) OR (leur recherche)) sur ((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 recherche) OR (leur recherche)) sur ((does cancer) or (modes cancer))%22*.