Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
1 interaction » 10 interaction, 17 interaction, 19 interaction
technology 1 » technology _
model trade » modern trade, model traem, model tree
de afrique » de l'afrique, en afrique, l afrique
trade de » trade die, rade de, trade date
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology 1 interaction model trade de communication costs a developpement de afrique.*.