Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
2.3.1 communications » 2.3.1.1 communication, 2.3 communication, 3.1 communication
developpement du » developpement de, developpement des, developpement et
formation under » formation des, formation over, estimation under
a developpement » au developpement, de developpement, le developpement
technology 3 » technology _, technology 1, technology 4
3 formation » 1 formation, 3 formulation, 1.3 formation
under river » under five, under cover, under review
river 2.3.1 » river 2.2.6, river 3.1, river 4.1.1
du afrique » en afrique, l afrique, de l'afrique
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 3 formation under river 2.3.1 communications costs a developpement du afrique.*.