Perhaps you should try some spelling variations:
information centers » information contents, information officers
class communication » mass communication, plans communication, crisis communication
communication costa » communication costs, communications costs, communication cote
12.4 developing » 1.4 developing, 2.2 developing, 1.3 developing
developing em » developing e, developing eq, developing amp
centers 3.2 » centers 2.2, centers 3.3, centers 3.8
costa 12.4 » costs 12.4, cost 2.4, cost 14.4
3.2 class » 3.3 class, 3.4.2 class, 30.8 class
em africa » 1 africa

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information centers 3.2 class communication costa 12.4 developing em africa.*.