Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
4 interaction » 4 interactions, 2 interaction, 3 interaction
technology 4 » technology _, technology 1, technology 3
model tree » model three, model free, model true
de afrique » de l'afrique, en afrique, l afrique
tree 3.2 » trees 3.2, tree 2.2, tree 4.2
costs le » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology 4 interaction model tree 3.2 communication costs le developpement de afrique.*.