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 gap » technology 1, technology 2.2, technology 3
gap formation » la formation, a formation, group 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 gap formation under river 2.3.1 communications costs a developpement du afrique.*.