Perhaps you should try some spelling variations:
10 communications » 10 communication, 14 communications, 2 communications
der developpement » de developpement, des developpements, leur developpement
technology trade » technology trends, technology transfer, technology transfers
communications a » communications _, communications law, communications media
integration 2 » integration 3, integration 4, integration 3.2
des afrique » en afrique, de l'afrique
db 10 » b 10, do 10, db 14
a der » _ der, 2 der, 3 der
2 db » 20 db, 2 de, 2 do

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

• Adding a wildcard symbol may retrieve word variants: technology trade integration 2 db 10 communications a der developpement des afrique.*.