Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
trade information » price information, private information, trade integration
10 communications » 10 communication, 14 communications, 2 communications
technology trade » technology trends, technology transfer, technology transfers
communications a » communications _, communications law, communications media
information 20 » information 2.0, information 2, information 24
des afrique » en afrique, de l'afrique
20 db » 20 de, 50 db
db 10 » b 10, do 10, db 14

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

• Adding a wildcard symbol may retrieve word variants: technology trade information 20 db 10 communications a leur developpement des afrique.*.