Perhaps you should try some spelling variations:
communication problem » communication problems, communications problems, communicating problem
china communication » china communications, chief communication, china's communications
information 1990s » information 1995, information 1999, information 1.9
developpement de » developpement des, developpement durable
3 developpement » de developpement, le developpement, et developpement
technologies 2 » technologies _, technologies 4
de afrique » de l'afrique, en afrique, l afrique
1990s 2.1 » 1990s 2.3, 1990s 2.3.1, 1990 7.1
2.1 china » 1.1 china, 3.1 china, 4.1 china
problem 3 » problem _

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information 1990s 2.1 china communication problem 3 developpement de afrique.*.