Perhaps you should try some spelling variations:
oral communication » personal communication
technologies 2 » technologies _, technologies 4
2.4 developing » 12.4 developing, 2.2 developing, 5.4 developing
contents how » content how, contents co, contents mot
developing a » developing _
costs 2.4 » costs 12.4, costs 23.4, cost 2.4
how oral » how moral, how rural, how arab
a africa » 1 africa, can africa, em africa

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information contents how oral communication costs 2.4 developing a africa.*.