Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
developpement de » developpement des, developpement durable
technology high » technology rights, technology how, technology help
a developpement » au developpement, de developpement, le developpement
de afrique » de l'afrique, en afrique, l afrique
case 6.2 » case 6.12, case f6.2, case 4.2
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 high inflation _ case 6.2 communication costs a developpement de afrique.*.