Perhaps you should try some spelling variations:
trade developpement » trade developement, trade development, de developpement
sent communication » event communication, debt communication, et communication
information need » information needs, information needed, information speed
developpement de » developpement des, developpement durable
technologies 2 » technologies _, technologies 4
de afrique » de l'afrique, en afrique, l afrique
need one » need more, need only
one sent » one agent, one event, one belt

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information need one sent communication _ trade developpement de afrique.*.