Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
key developpement » de developpement, le developpement, et developpement
formation across » information across, variation across, variations across
developpement en » developpement et, developpement des, developpement de
4 communication » 3 communication, 5.4 communication, de communication
across crises » across classes
barriers key » barriers been, barriers _, barriers a
crises 4 » crises _, crises a, crises 2

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

• Adding a wildcard symbol may retrieve word variants: technology _ formation across crises 4 communication barriers key developpement en afrique.*.