Perhaps you should try some spelling variations:
regional development » national development, social development, rural development
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
revolution das » revolution dans, revolution des, evolution das
technology 3 » technology _, technology 1, technology 4
3 revolution » a revolution, 4 revolution, 1 revolution
das l'espace » dans l'espace, de l'espace, a l'espace
l'espace 4.1 » l'espace 1.1, space 4.1, l'espace et
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 das l'espace 4.1 communication _ regional development 1 afrique.*.