Perhaps you should try some spelling variations:
13.3 communication » 1.3 communication, 3.3 communication, 13.3.9 communication
information what » information war, information when, information wants
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
vt information » ct information, get information, iot information
technology vt » technology vi, technology 1, technology 3
de afrique » de l'afrique, en afrique, l afrique
each 13.3 » peace 13.3
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 vt information what each 13.3 communication costs 4 developpement de afrique.*.