Perhaps you should try some spelling variations:
communication 3.3 » communication _, communication a, communication 1
2.3 communication » 3.2 communication, de communication, 4 communication
die developpement » de developpement, le developpement, du developpement
innovation space » innovation impact, innovation science, innovation sources
developpement de » developpement des, developpement durable
technology u.s » technology uses, technology 2.2, technology use
u.s innovation » does innovation
space space » space place, place space, space race
space 2.3 » space 2.1, space 2.2, space 3.3

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

• Adding a wildcard symbol may retrieve word variants: technology u.s innovation space space 2.3 communication 3.3 die developpement de l'afrique.*.