Perhaps you should try some spelling variations:
primaten manual » primate manual, probation manual
die primaten » die privaten, die primaren, die private
manual time » manual crime, manual tiger, manual title
gift world » bit world, gatt world, ict world
iot world » post world, lost world, art world

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: "2008 ((gift world) OR (iot world)) die primaten manual time*".