Perhaps you should try some spelling variations:
technology trade » technology trends, technology transfer, technology transfers
3 communication » 4 communication, de communication, data communication
4 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
der trade » der trager, der traum, fur trade
l afrique » en afrique
trade 3 » trade _, trade a, trade 4
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology trade integration der trade 3 communication costs 4 developpement l afrique.*.