Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
information have » information how, information harness, transformation have
developpement de » developpement des, developpement durable
era information » a information, via information, 4a information
technology era » technology eva, technology e, technology e.g
have spaces » phase spaces, safe spaces, game spaces
spaces 2.1 » space 2.1, spaces 1.1, spaces 1

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

• Adding a wildcard symbol may retrieve word variants: technology era information have spaces 2.1 communication costs _ developpement de l'afrique.*.