Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
4.1.1 communications » 4.1.7 communication, 4.2.1 communication, 4.5.1 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 4.1.1 » cover 4.1.1, river 1.1, river 4.2.2
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 4.1.1 communications costs a developpement du afrique.*.