Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
model development » local development, social development, global development
inflation rates » inflation rate
communication 3 » communication _, communication a
development des » development does, development desd, development ds
rates spaces » places spaces, papers spaces, spaces spaces
des afrique » en afrique, de l'afrique
spaces 2.1 » space 2.1, spaces 1.1, spaces 1

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

• Adding a wildcard symbol may retrieve word variants: technology _ inflation rates spaces 2.1 communication 3 model development des afrique.*.