Perhaps you should try some spelling variations:
information centers » information contents, information officers
were communication » where communication, aware communication, secure communication
technologies 2 » technologies _, technologies 4
7.3 developing » 3.3 developing, 1.3 developing, 2.2 developing
centers how » center how, centers hold, century how
costs 7.3 » costs 2.3, costs 4.3, costs 5.3
how were » how we, how well

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information centers how were communication costs 7.3 developing _ africa.*.