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
de developpement » sme development
developpement l » developpement il, developpement la, developpement de
l afrique » en afrique
model de » model due, model d, model du

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 _ vertical communication model de developpement l afrique.*.