Perhaps you should try some spelling variations:
krebsforschung die » krebsforschung _, krebsforschung und
22recent results » present results, recent result, recents results
2c fortschritte » 2 fortschritte, 23 fortschritte, 24 fortschritte
les recherches » des recherches, de recherches
sur lines » spur lines, hour lines, sur lignee
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: %((22recent results) OR (recent results)) in cancer research%2c fortschritte der ((krebsforschung die) OR (krebsforschung heute))%c3%a8s dans les recherches ((sur lines) OR (four lines)) cancer%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22recent results) or (recent results)) in cancer research%2c fortschritte der ((krebsforschung die) or (krebsforschung heute))%c3%a8s dans les recherches ((sur lines) OR (four lines)) cancer%22".
• Adding a wildcard symbol may retrieve word variants: %((22recent results) or (recent results)) in cancer research%2c fortschritte der ((krebsforschung die) or (krebsforschung heute))%c3%a8s dans les recherches ((sur lines) OR (four lines)) cancer%22*.