Perhaps you should try some spelling variations:
1.1 communication » 4.1 communication, 1.3 communication, 1.4 communication
rural development » social development
revolution die » revolution _, revolution how, revolution 1
technology 3 » technology _, technology 1, technology 4
3 revolution » a revolution, 4 revolution, 1 revolution
die l'espace » de l'espace, dans l'espace, a l'espace
l'espace 1.1 » space 1.1, l'espace et, l'espace les
1 afrique » l afrique, en afrique, 1 enrique

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

• Adding a wildcard symbol may retrieve word variants: technology 3 revolution die l'espace 1.1 communication _ rural development 1 afrique.*.