Perhaps you should try some spelling variations:
integration layer » interaction layer, integration unter, integration levels
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
technology trade » technology trends, technology transfer, technology transfers
a developpement » au developpement, de developpement, le developpement
developpement l » developpement il, developpement la, developpement de
layer prices » lower prices, water prices, labour prices
prices 6.2 » prices 3.2, prices 4.2, prices 5.2
l afrique » en afrique
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology trade integration layer prices 6.2 communication costs a developpement l afrique.*.