Perhaps you should try some spelling variations:
krebsforschung uber » krebsforschung die, krebsforschung und, krebsforschung beim
krebsforschung der » krebsforschung die, krebsforschung das, krebsforschung zur
2c fortschritte » 2 fortschritte, 23 fortschritte, 24 fortschritte
les recherches » des recherches, de recherches
four does » four dies, four dos, floor does
a8s dans » ans dans, arts dans, ames dans
sur does » sur des, star does, user does

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) OR (krebsforschung uber))%c3%a8s dans les recherches ((sur does) OR (four does)) 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) or (krebsforschung uber))%c3%a8s dans les recherches ((sur does) OR (four does)) cancer%22".
• Adding a wildcard symbol may retrieve word variants: %recent results in cancer research%2c fortschritte der ((krebsforschung der) or (krebsforschung uber))%c3%a8s dans les recherches ((sur does) OR (four does)) cancer%22*.