Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication skills » communication services, communication systems
information portals » information problems, information policies, information products
development use » development using, development under, development unit
technologies 4 » technologies _
4 information » 2 information, 1 information
portals 18 » portals _, portals 5, portals 6
18 optical » 12 optical, 14 optical, 8 optical
skills 2 » skills _, skills a, skills 1

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information portals 18 optical communication skills 2 development use africa.*.