Perhaps you should try some spelling variations:
online communication » mobile communication, business communication, mobile communications
developpement et » developpement des, developpement de, development east
fathers online » teachers online, partners online, other online
6 variation » 6 variations, _ variation, 2 variation
typology 6 » typology _, typology 4.1
et afrique » en afrique, l afrique
12 et » 12 e, 13 et
1 et » 13 et, 1 net, 1 set

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: "typology 6 variation _ fathers online communication ((1 et) OR (12 et)) developpement et afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology 6 variation _ fathers online communication ((1 et) OR (12 et)) developpement et afrique.*.