Perhaps you should try some spelling variations:
krebsforschung progr » krebsforschung uber, krebsforschung vom, krebsforschung zur
krebsforschung from » krebsforschung vom, krebsforschung beim, krebsforschung _
krebsforschung der » krebsforschung uber, krebsforschung die, krebsforschung das
present results » treatment results
2c fortschritte » 2 fortschritte, 23 fortschritte, c fortschritte
le cancer » e cancer, male cancer, pre cancer
bas dans » base dans, pas dans, bases 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: %((recent results) OR (present results)) in cancer research%2c fortschritte der ((((krebsforschung progr) OR (krebsforschung from))) OR (krebsforschung der))%c3%bas dans les ((recherches sur) OR (recherche sur)) le cancer%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((recent results) or (present results)) in cancer research%2c fortschritte der ((((krebsforschung progr) OR (krebsforschung from))) or (krebsforschung der))%c3%bas dans les ((recherches sur) or (recherche sur)) le cancer%22".
• Adding a wildcard symbol may retrieve word variants: %((recent results) or (present results)) in cancer research%2c fortschritte der ((((krebsforschung progr) OR (krebsforschung from))) or (krebsforschung der))%c3%bas dans les ((recherches sur) or (recherche sur)) le cancer%22*.