Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
oral communication » mobile communication, _ communication, risk communication
model development » local development, social development, global development
information age » information gaps, information laws, information _
development co » development _, development a, development case
costs model » cost model, cost models

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

• Adding a wildcard symbol may retrieve word variants: technology _ information age de oral communication costs model development co afrique.*.