Perhaps you should try some spelling variations:
crisis communication » risk communication, mass communication
der developpement » de developpement, des developpements, leur developpement
developpement la » developpement de, developpement et, developpement du
informal public » informed public, informing public, informal justice
communication 4 » communication _, communication a, communication 3
la afrique » l afrique, la fabrique, en afrique
public 19 » public _, public 2, public 4
4 der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: technologies _ informal public 19 crisis communication 4 der developpement la afrique.*.