Perhaps you should try some spelling variations:
krebsforschung from » krebsforschung vom, krebsforschung beim, krebsforschung _
recherches spur » recherches sur, recherches pour, rechereches sur
lines cancer » linear cancer, linked cancer, lungs cancer
demande les » demande des, demandes des, demande de
demand les » demand led, demand last, demand lead
spur lines » spur eines, four lines, spur einer

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "recent results in cancer research, fortschritte der krebsforschung from ((demand les) OR (demande les)) recherches spur lines cancer".
• Adding a wildcard symbol may retrieve word variants: recent results in cancer research, fortschritte der krebsforschung from ((demand les) OR (demande les)) recherches spur lines cancer*.