Perhaps you should try some spelling variations:
communication versus » communication verbal, communication overlap, communication values
class communication » mass communication, plans communication, crisis communication
developed country » developed countries, developing country
human developed » human development, human developing, human developments
technologies 4 » technologies _
4 integration » 3 integration, 2 integration, 4.1 integration
integration 4 » integration 3
role class » whole class, race class, one class
4 role » 3 role

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 integration 4 role class communication versus human developed country risk.*.