Perhaps you should try some spelling variations:
5.5 communication » 3.5 communication, 2.5 communication, 5.5.2 communication
information cost » information costs, information lost, information case
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
technology 2 » technology _, technology 1, technology 3
cost rules » court rules, core rules, past rules
de afrique » de l'afrique, en afrique, l afrique
rules 5.5 » rules 5.1, rules 3.2, rules 4.2
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 2 information cost rules 5.5 communication costs 4 developpement de afrique.*.