Perhaps you should try some spelling variations:
information state » information states, information space, information staat
developpement de » developpement des, developpement durable
2.1 information » 3.1 information
2 communication » 3 communication, 4 communication, 1 communication
technology 2.1 » technology 2.2, technology 3.1, technology 1
de afrique » de l'afrique, en afrique, l afrique
space 2 » space _, space a, space 1

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology 2.1 information state space 2 communication costs _ developpement de afrique.*.