Perhaps you should try some spelling variations:
des developpements » deux developpements, de developpement, et developpements
communication 3.3 » communication _, communication a, communication 1
developpements et » developpement et, developpement en, developpements de
et afrique » en afrique, l afrique
gas mass » das mass, gas map, gas gas
3.3 des » 3.3 das, 3.3 der, 3.3 de
a gas » _ gas, 2 gas, 3 gas

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

• Adding a wildcard symbol may retrieve word variants: technologies _ innovation a gas mass communication 3.3 des developpements et afrique.*.