Perhaps you should try some spelling variations:
time communication » de communication, mobile communication, online communication
communication cost » communication costs, communication costa, communications costs
technologies a » technologies _, technologies 4, technologies 2
contents since » context since, contents index
a information » 2 information, 1 information
4 developing » 3 developing
developing v » developing av, developing _, developing a
since time » single time, space time
v africa » 1 africa, em africa
cost 4 » cost _, cost 2.4

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

• Adding a wildcard symbol may retrieve word variants: technologies a information contents since time communication cost 4 developing v africa.*.