Perhaps you should try some spelling variations:
rolf » role (Expand Search), roll (Expand Search), roof (Expand Search)
root » robot (Expand Search), room (Expand Search)
henne\" » henner\" (Expand Search), hence\" (Expand Search), henna\" (Expand Search)
hennes\" » henners\" (Expand Search), hences\" (Expand Search), hennas\" (Expand Search), gennes\" (Expand Search), henner\" (Expand Search), pennes\" (Expand Search)
hennyr\" » henny\" (Expand Search), henner\" (Expand Search), hennuyer\" (Expand Search)
hannes\" » channels\" (Expand Search), johannes\" (Expand Search)

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: "\"\\"(rolf OR (proof OR root)) ((henne\\" OR hennyr\\") OR (hennes\\" OR hannes\\"))\"".
• Removing quotes may allow a broader search: (rolf OR (proof OR root)) ((henne OR hennyr ) OR (hennes OR hannes )).