Perhaps you should try some spelling variations:
oral communication » personal communication
technologies co » technologies _, technologies 4, technologies 2
co information » do information, 2 information, 1 information
1 developing » 3 developing, 4 developing, 2 developing
costs 1 » costs _, costs 4, costs a
1 oral » 10 oral, 14 oral, 16 oral
contents » context

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

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