Perhaps you should try some spelling variations:
downward communication » towards communication, aware communication, hazard communication
communication 6.2 » communication 3.2, communication 3.3, communication 2
information 3 » information 2
4 development » 2 development, 4 developing
der downward » _ downward, a downward, 2.5 downward
3 der » _ der, 2 der
6.2 4 » 6.2 _, 6.2 a, 6.2 x

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information 3 der downward communication 6.2 4 development latin afrique.*.