Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
des informations » aids information
developpement du » developpement de, developpement des, developpement et
4 developpement » de developpement, le developpement, et developpement
technology des » technology does, technology debts, technology nodes
du afrique » en afrique, l afrique, de l'afrique
und trade » aid trade, und trans, und traum
trade 4.1 » trade 2.2, trade 3.2
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 des informations und trade 4.1 communication costs 4 developpement du afrique.*.