Perhaps you should try some spelling variations:
information rates » information states, information ratio, information rules
de communication » mobile communication, online communication
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
3 information » 1 information
technology 3 » technology _, technology 1, technology 4
rates saving » water saving, rates during, rates using
de afrique » de l'afrique, en afrique, l afrique
saving de » saving does, saving new, saving _
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 3 information rates saving de communication costs 4 developpement de afrique.*.