Perhaps you should try some spelling variations:
krebsforschung die » krebsforschung _, krebsforschung heute
krebsforschung und » krebsforschung _, krebsforschung heute, praxisforschung und
present results » recent results, treatment results
2c fortschritte » 2 fortschritte, 23 fortschritte, 24 fortschritte
recherches sur » recherche sur
les recherches » des recherches, de recherches
does cancer » modes cancer, nodes cancer, does cantor
ames dans » armes dans, carmes dans, actes dans
a8s dans » ans dans, arts dans, ils dans
sur does » sur des, four does, star 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: %present results in cancer research%2c fortschritte der ((krebsforschung und) OR (krebsforschung die))%c3%((a8s dans) OR (ames dans)) les recherches sur does cancer%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%present results in cancer research%2c fortschritte der ((krebsforschung und) or (krebsforschung die))%c3%((a8s dans) OR (ames dans)) les recherches sur does cancer%22".
• Adding a wildcard symbol may retrieve word variants: %present results in cancer research%2c fortschritte der ((krebsforschung und) or (krebsforschung die))%c3%((a8s dans) OR (ames dans)) les recherches sur does cancer%22*.