Perhaps you should try some spelling variations:
trade information » price information, private information, trade integration
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
technology trade » technology trends, technology transfer, technology transfers
developpement du » developpement de, developpement des, developpement et
information use » information und, information 2
du afrique » en afrique, l afrique, de l'afrique
use a » use _
a 2.1 » b 2.1, _ 2.1, a 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology trade information use a 2.1 communication costs _ developpement du afrique.*.