Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
1 interaction » 10 interaction, 17 interaction, 19 interaction
interaction 2 » interaction _, interaction 1, interaction 4
technology 1 » technology _
politics 2.1 » politics 12.1, politics 2.3, politics 4.1
2 politics » 2 political
de afrique » de l'afrique, en afrique, l afrique
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 1 interaction 2 politics 2.1 communication costs le developpement de afrique.*.