Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
informal schools » formal schools, normal schools, formal school
e communication » de communication, 1 communication, une communication
development can » development case, development co, development canada
technologie c » technologies 2, technologies 3, technologies 1
schools does » schools homes, schools do, schooling does
c informal » _ informal, 3 informal, 8 informal
cost world » post world, lost world, count world
can africa » urban africa
does e » does de, does _, does a

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

• Adding a wildcard symbol may retrieve word variants: technologie c informal schools does e communication cost world development can africa.*.