Perhaps you should try some spelling variations:
changes development » change development, channel development, challenges development
information costs » information contents, information centers, information content
communication 19 » communication 1, communication 10, communication 9
development six » development site, development sri, development sdn
technologies a » technologies _, technologies 4, technologies 2
a information » 2 information, 1 information
six african » five african
19 changes » 1 changes, 15 changes, 9 changes
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
4.1 human » 2.1 human, d.c human, 3.2 human

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

• Adding a wildcard symbol may retrieve word variants: technologies a information costs 4.1 human communication 19 changes development six african.*.