Perhaps you should try some spelling variations:
krebsforschung die » krebsforschung _, krebsforschung heute
krebsforschung und » krebsforschung _, krebsforschung heute, praxisforschung und
22recent results » recent results, present results, recent result
2c fortschritte » 23 fortschritte, 24 fortschritte, 25 fortschritte
2 fortschritte » 23 fortschritte, 24 fortschritte, 25 fortschritte
les cancer » les cancers, lines cancer, does cancer
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 in cancer research%((2c fortschritte) OR (2 fortschritte)) der ((krebsforschung die) OR (krebsforschung und))%c3%a8s dans les ((recherches sur) OR (recherche sur)) les cancer%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22recent results in cancer research%((2c fortschritte) or (2 fortschritte)) der ((krebsforschung die) OR (krebsforschung und))%c3%a8s dans les ((recherches sur) or (recherche sur)) les cancer%22".
• Adding a wildcard symbol may retrieve word variants: %22recent results in cancer research%((2c fortschritte) or (2 fortschritte)) der ((krebsforschung die) OR (krebsforschung und))%c3%a8s dans les ((recherches sur) or (recherche sur)) les cancer%22*.