Perhaps you should try some spelling variations:
communication slaves » communication spaces, communication series, communication styles
information 1.5.2 » information 1.2, information 2
urban development » human development
2 communication » 3 communication, 4 communication, 1 communication
technologies 4 » technologies _
4 information » 2 information, 1 information
europe africa » europe asia
slaves urban » spaces urban, frames urban, lands urban
1.5.2 dem » 1.5.2 die, 3.5.2 der, 5.5.2 der
dem 2 » dem _

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information 1.5.2 dem 2 communication slaves urban development europe africa.*.