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
lines cancer » linear cancer, linked cancer, lungs cancer
does cancer » modes cancer, nodes cancer, does cantor
les cancer » les cancers, gets cancer, lips cancer
dans » das, dass

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%ans dans ((les recherches) OR (de recherches)) sur ((((les cancer) OR (does cancer))) OR (lines 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%ans dans ((les recherches) or (de recherches)) sur ((((les cancer) OR (does cancer))) or (lines cancer))%22".
• Adding a wildcard symbol may retrieve word variants: %recent results in cancer research%2c fortschritte der krebsforschung der%c3%ans dans ((les recherches) or (de recherches)) sur ((((les cancer) OR (does cancer))) or (lines cancer))%22*.