Perhaps you should try some spelling variations:
communications network » communications networks, communication network, communication networks
limited development » oriented development, site development, led development
10 communications » 10 communication, 14 communications, 2 communications
development sino » development using, development since, development saint
network limited » network limits, network dominated
technologies a » technologies _, technologies 4, technologies 2
formulacion de » formulation des, formacion de, formulation _
a formulacion » la formulacion, a formulation, la formulation
sino african » six african, line african, pan african
de 2 » dem 2, des 2, der 2
2 10 » _ 10, 2 1, 9 10

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

• Adding a wildcard symbol may retrieve word variants: technologies a formulacion de 2 10 communications network limited development sino african.*.