Perhaps you should try some spelling variations:
downward communication » towards communication, aware communication, hazard communication
information centers » information contents, information officers
communication 3.2 » communication 3.3, communication 3.4, communication 2
technologies 2 » technologies _, technologies 4
development en » developpement en, development menu, development eco
use downward » _ downward, a downward, 2.5 downward
centers use » centers case, century use, century used
3.2 2 » 3.2 _, 3.2 a, 3.2 k

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information centers use downward communication 3.2 2 development en afrique.*.