Perhaps you should try some spelling variations:
oral communication » personal communication
information costs » information contents, information centers, information content
technologies 1 » technologies _, technologies 4, technologies 2
a developing » a development
costs case » costs cash
case oral » ashe oral
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 information costs case oral communication costs a developing _ africa.*.