Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information centre » information centers, information contents
technologies a » technologies _, technologies 4, technologies 2
2.1 developing » 2.2 developing, 2.3 developing, 2.6 developing
a information » 2 information, 1 information
developing em » developing e, developing eq, developing amp
one personal » some personal, more personal, one person
centre one » central one, centre dome, centre de
costs 2.1 » costs 2.3, costs 4.1, costs 2.2
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 a information centre one personal communication costs 2.1 developing em africa.*.