Perhaps you should try some spelling variations:
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
developpement de » developpement des, developpement durable
2.2 integration » 3.2 integration, 5.2 integration, 3.3 integration
4 developpement » de developpement, le developpement, et developpement
technology 2.2 » technology _, technology 1, technology 3
de afrique » de l'afrique, en afrique, l afrique
der trade » der trager, der traum, fur trade
trade 2.2 » trade 3.2, trade 4.1
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 2.2 integration der trade 2.2 communication costs 4 developpement de afrique.*.