Perhaps you should try some spelling variations:
krebsforschung progr » krebsforschung from, krebsforschung der, krebsforschung uber
krebsforschung sakk » krebsforschung das, krebsforschung swiss, krebsforschung _
22recent results » recent results, present results, recent result
23 fortschritte » 24 fortschritte, 25 fortschritte, 3 fortschritte
2c fortschritte » 24 fortschritte, 25 fortschritte, c fortschritte
2 fortschritte » 24 fortschritte, 25 fortschritte, 5 fortschritte
le cancer » e cancer, male cancer, pre cancer
dans » das, dass

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 (((23 fortschritte) OR (2 fortschritte)))) der ((krebsforschung progr) OR (krebsforschung sakk))%c3%ans dans les ((recherches sur) OR (recherche sur)) le cancer%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22recent results in cancer research%((2c fortschritte) or (((23 fortschritte) OR (2 fortschritte)))) der ((krebsforschung progr) or (krebsforschung sakk))%c3%ans dans les ((recherches sur) or (recherche sur)) le cancer%22".
• Adding a wildcard symbol may retrieve word variants: %22recent results in cancer research%((2c fortschritte) or (((23 fortschritte) OR (2 fortschritte)))) der ((krebsforschung progr) or (krebsforschung sakk))%c3%ans dans les ((recherches sur) or (recherche sur)) le cancer%22*.