Perhaps you should try some spelling variations:
information center » information centers, information centre, information content
cell communication » cell communications, oral communication, verbal communication
communication cost » communication costs, communication costa, communications costs
technologie und » technologies 2.1
und information » fund information, road information, award information
1.5 developing » 1.3 developing, 15 developing, 1.4 developing
developing e » developing _, developing a, developing east
center 1.1 » center 21.1, center 2.1, center 3.1
1.1 cell » 1.1 call, 4.1 cell, 5.1 cell
cost 1.5 » cost 11.5, cost 1.2, cost 15
e africa » em africa, de africa, eu africa

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

• Adding a wildcard symbol may retrieve word variants: technologie und information center 1.1 cell communication cost 1.5 developing e africa.*.