Perhaps you should try some spelling variations:
online communication » mobile communication, business communication, mobile communications
technologies 1 » technologies _, technologies 4, technologies 2
information a » information age, information about
development l » development li, development 1, development law
rock online » rich online
l afrique » en afrique
a rock » _ rock
3.1 a » 3.1 _
2.1 a » 2.1 _

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies 1 information a rock online communication ((3.1 a) OR (2.1 a)) development l afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies 1 information a rock online communication ((3.1 a) OR (2.1 a)) development l afrique.*.