Perhaps you should try some spelling variations:
communication sector » telecommunication sector, telecommunications sector, communication series
oral communication » personal communication
information need » information needs, information needed, information speed
development can » development case, development co, development canada
can africa » urban africa
need de » need le, need fide, need one
de oral » de otras, new oral

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies _ information need de oral communication sector policy development can africa.~.
• Adding a wildcard symbol may retrieve word variants: technologies _ information need de oral communication sector policy development can africa.*.