Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
data communication » data communications
technologies 2.1 » technologies _, technologies 4, technologies a
information does » information der, information due, information duties
en developpement » et developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
2.1 information » 3.1 information
barriers en » barriers been, barriers key, barriers _
de afrique » de l'afrique, en afrique, l afrique
does e » does de, does _, does a
e data » e datas, age data, cge data

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 does e data communication barriers en developpement de afrique.*.