Perhaps you should try some spelling variations:
oral communication » personal communication
communication cost » communication costs, communication costa, communications costs
technologies 2 » technologies _, technologies 4
3.3 developing » 4 developing, 2 developing, 1 developing
contents how » content how, contents co, contents mot
developing a » developing _
how oral » how moral, how rural, how arab
cost 3.3 » cost 3.2, cost 2.3, cost 3.4
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 3.3 developing a africa.*.