Perhaps you should try some spelling variations:
biologe » biologie, biologia
biologen » biologien, biologian, biologie
biologic » biologie
biological » biologieal
biologicn » biologien, biologics, biologica, biologin

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: ((((biologe OR biologic) OR biological) OR (biologen OR biologicn)) OR biology).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((biologe OR biologic) or biological) or (biologen or biologicn)) or biology)".
• Adding a wildcard symbol may retrieve word variants: ((((biologe OR biologic) or biological) or (biologen or biologicn)) or biology)*.