Perhaps you should try some spelling variations:
oral communication » personal communication
communication cost » communication costs, communication costa, communications costs
technologies 2 » technologies _, technologies 4
3.2 developing » 3.3 developing, 2.2 developing, 3 developing
contents how » content how, contents co, contents mot
developing a » developing _
how oral » how moral, how rural, how arab
cost 3.2 » cost 2.4
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 cost 3.2 developing a africa.*.