Perhaps you should try some spelling variations:
vertical communication » verbal communication, virtual communication, optical communication
communication model » communication media
debts integration » dis integration, res integration, eu's integration
technology debts » technology debate, technology data, technology dlt
du developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
2 vertical » _ vertical, 6 vertical, 4 vertical
l afrique » en afrique
model du » model due, model d, model dal

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

• Adding a wildcard symbol may retrieve word variants: technology debts integration 3 2 vertical communication model du developpement l afrique.*.