Perhaps you should try some spelling variations:
models communication » modern communication, modeling communication, modern communications
12.4 developing » 1.4 developing, 2.2 developing, 1.3 developing
technologies 4 » technologies _
network credit » network media, network creation
credit models » credit model, credit modern, credit levels
developing 4 » developing _, developing a, developing e
4 transport » 3 transport, 6.4 transport, de transport
costs 12.4 » costs 11.4, costs 12.3, costs 2.4
4 areas » 1 areas, 2 areas, 4 areal

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 transport network credit models communication costs 12.4 developing 4 areas.*.