Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
4.2 communications » 4.2 communication, 3.2 communication, 6.2 communication
information moral » information model, information models, information format
4 developpement » de developpement, le developpement, et developpement
vt information » ct information, get information, iot information
technology vt » technology vi, technology 1, technology 3
moral rules » moral rule, formal rules, social rules
des afrique » en afrique, de l'afrique
rules 4.2 » rules 3.2, rules 4.3
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 moral rules 4.2 communications costs 4 developpement des afrique.*.