Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
communication model » communication media
a developpement » au developpement, de developpement, le developpement
1 integrating » 10 integrating, _ integrating, 4 integrating
integrating a » integrating _, integrating human
technology 1 » technology _
des afrique » en afrique, de l'afrique
4 voice » 4 voices, _ voice, a voice
model a » model 1

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

• Adding a wildcard symbol may retrieve word variants: technology 1 integrating a 4 voice communication model a developpement des afrique.*.