Perhaps you should try some spelling variations:
6.13 communication » 6.1.3 communication, 2.3 communication, 4.1 communication
technology price » technology rich, technology voice, technology service
au developpement » du developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
de afrique » de l'afrique, en afrique, l afrique
rate case » state case, write case, rate caps
case 6.13 » case 6.3, case 6.1, case 6.12
costs au » costs a, costs amy, costs _

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

• Adding a wildcard symbol may retrieve word variants: technology price inflation rate case 6.13 communication costs au developpement de afrique.*.