Perhaps you should try some spelling variations:
walter communication » water communication, master communication, matter communication
communication model » communication media
technologies 2.1 » technologies _, technologies 4, technologies a
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
2.1 innovation » 2.2 innovation, 2.3 innovation, 2012 innovation
hand walter » hans walter, und walter, sind walter
model de » model due, model d, model du
a hand » a hands, _ hand, a hard

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 innovation a hand walter communication model de developpement en afrique.*.