Perhaps you should try some spelling variations:
information centers » information contents, information officers
communication cost » communication costs, communication costa, communications costs
technologies 2.1 » technologies _, technologies 4, technologies a
en communication » open communication, lean communication, when communication
2.1 information » 3.1 information
3.3 developing » 4 developing, 2 developing, 1 developing
developing e » developing _, developing a, developing east
centers 3.1 » center 3.1, centers 3.3, centers 3.8
cost 3.3 » cost 3.2, cost 2.3, cost 3.4
e africa » em africa, de africa, eu africa
3.1 en » 3.1 ein, 3.1 el, 3.1 eu

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information centers 3.1 en communication cost 3.3 developing e africa.*.