Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technology price » technology rich, technology voice, technology service
1 communications » 10 communications, 14 communications, 1 communication
4 developpement » de developpement, le developpement, et developpement
inflation das » inflation bias, inflation tax, inflation a
des afrique » en afrique, de l'afrique
das case » das coase, das cafe, das close
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 price inflation das case 1 communications costs 4 developpement des afrique.*.