Perhaps you should try some spelling variations:
krebsforschung progr » krebsforschung from, krebsforschung uber, krebsforschung vom
krebsforschung der » krebsforschung uber, krebsforschung die, krebsforschung das
present results » treatment results
2c fortschritte » 2 fortschritte, 23 fortschritte, 24 fortschritte
le cancer » male cancer, pre cancer
bas dans » base dans, pas dans, bases dans
a8s dans » ans dans, arts dans, ames dans
e 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) OR (present results)) in cancer research%2c fortschritte der ((krebsforschung progr) OR (krebsforschung der))%c3%((a8s dans) OR (bas dans)) les ((recherches sur) OR (recherche sur)) ((le cancer) OR (e 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 der))%c3%((a8s dans) or (bas dans)) les ((recherches sur) or (recherche sur)) ((le cancer) OR (e 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 der))%c3%((a8s dans) or (bas dans)) les ((recherches sur) or (recherche sur)) ((le cancer) OR (e cancer))%22*.