Perhaps you should try some spelling variations:
krebsforschung progr » krebsforschung from, krebsforschung uber, krebsforschung vom
krebsforschung der » krebsforschung uber, krebsforschung die, krebsforschung zur
krebsforschung das » krebsforschung die, krebsforschung sakk, krebsforschung _
22recent results » recent results, present results, recents results
23 fortschritte » 2 fortschritte, 24 fortschritte, 25 fortschritte
recent result » recent results, recents results, resent results
pre cancer » care 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) OR (recent result)) in cancer research%23 fortschritte der ((krebsforschung progr) OR (((krebsforschung der) OR (krebsforschung das))))%c3%a8s dans les ((recherches sur) OR (recherche sur)) pre cancer%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22recent results) OR (recent result)) in cancer research%23 fortschritte der ((krebsforschung progr) or (((krebsforschung der) or (krebsforschung das))))%c3%a8s dans les ((recherches sur) or (recherche sur)) pre cancer%22".
• Adding a wildcard symbol may retrieve word variants: %((22recent results) OR (recent result)) in cancer research%23 fortschritte der ((krebsforschung progr) or (((krebsforschung der) or (krebsforschung das))))%c3%a8s dans les ((recherches sur) or (recherche sur)) pre cancer%22*.