Perhaps you should try some spelling variations:
communication costa » communication costs, communications costs, communication cote
information centre » information centers, information contents
technologies 2.1 » technologies _, technologies 4, technologies a
el communication » cell communication, real communication, 3 communication
developing urban » development urban, developing human, developing areas
2.1 information » 3.1 information
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
urban africa » urban area
centre 3.4 » centre 4.4, centre 3.2, century 3.4
costa 2.2 » cost 2.2, costs 2.2, forsta 2.2
3.4 el » 2.4 el, 3.4 eq, 3.4 et

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 centre 3.4 el communication costa 2.2 developing urban africa.*.