Perhaps you should try some spelling variations:
communication phase » communication case, communication based, communication paper
3.3 communication » 2.3 communication, 3.2 communication, 3.5 communication
der developpement » de developpement, des developpements, leur developpement
developpement de » developpement des, developpement durable
inflation goods » inflation good, inflation gross, information goods
goods private » good private, bonds private, goes private
private 3.3 » private 1.1, private 1.2, private 4.2
de afrique » de l'afrique, en afrique, l afrique

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

• Adding a wildcard symbol may retrieve word variants: technology _ inflation goods private 3.3 communication phase der developpement de afrique.*.