Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
de communication » mobile communication, online communication
technologies a » technologies _, technologies 4, technologies 2
2.4 developing » 12.4 developing, 2.2 developing, 5.4 developing
a information » 2 information, 1 information
contents die » contents i, contents ai, contents je
die de » die die, die der, die den

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

• Adding a wildcard symbol may retrieve word variants: technologies a information contents die de communication cost 2.4 developing _ africa.*.