Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
communication model » communication media
integrating land » integrating a, integrated land, integrating data
de developpement » sme development
developpement de » developpement des, developpement durable
10 integrating » 1 integrating, _ integrating, 4 integrating
technology 10 » technology 110, technology 1, technology 11
de afrique » de l'afrique, en afrique, l 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 10 integrating land _ voice communication model de developpement de afrique.*.