Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
communication model » communication media
land developpement » land development, le developpement, au developpement
developpement en » developpement et, developpement des, developpement de
10 integration » 11 integration, 1.2 integration, 3 integration
technology 10 » technology 110, technology 1, technology 11
model land » model law, model laws, model lapm

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

• Adding a wildcard symbol may retrieve word variants: technology 10 integration 3 _ voice communication model land developpement en afrique.*.