Perhaps you should try some spelling variations:
yemen communication » yemen communications, human communication, open communication
information 4.3.2 » information 4.3.3, information 2.3.2, information 3.2
communication 3 » communication _, communication a
developpement l » developpement il, developpement la, developpement de
technologies 2 » technologies _, technologies 4
4.3.2 die » 3.3.2 die
die yemen » die demenz, die themen, die memex
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information 4.3.2 die yemen communication 3 _ developpement l afrique.*.