Perhaps you should try some spelling variations:
paper communications » power communication, face communications, layer communication
communications costs » communication costs, communications _
information 2.5 » information 2.2, information 2.7, information 2.0
developing five » developing civic, developing field, developing city
technologies 1 » technologies _, technologies 4, technologies 2
models paper » models per, models pattern, boxes paper
4 developing » 3 developing
five african » from african, four african, six african
2.5 models » 2.2 models, 2 models, 3.1 models
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 information 2.5 models paper communications costs 4 developing five african.*.