Perhaps you should try some spelling variations:
oral communication » mobile communication, _ communication, risk communication
communication cost » communication costs, communications costs, communication mode
model development » local development, social development, global development
information laws » information law, information flows, information gaps
development co » development _, development a, development case

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

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