Perhaps you should try some spelling variations:
krebsforschung from » krebsforschung vom, krebsforschung beim, krebsforschung _
les recherches » de recherches
care cancer » cancer cancer
le cancer » e cancer, male cancer, pre cancer

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, fortschritte der ((krebsforschung progres) OR (krebsforschung from)) de ((les recherches) OR (des recherches)) sur ((le cancer) OR (care cancer)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "recent results in cancer research, fortschritte der ((krebsforschung progres) OR (krebsforschung from)) de ((les recherches) or (des recherches)) sur ((le cancer) or (care cancer))".
• Adding a wildcard symbol may retrieve word variants: recent results in cancer research, fortschritte der ((krebsforschung progres) OR (krebsforschung from)) de ((les recherches) or (des recherches)) sur ((le cancer) or (care cancer))*.