Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
cross communication » crisis communication, class communication, crisis communications
eu developpement » et developpement, du developpement, au developpement
developpement de » developpement des, developpement durable
formulacion de » formulation des, formacion de, formulation _
barriers eu » barriers key, barriers _, barriers a
de afrique » de l'afrique, en afrique, l afrique
de does » der does, do does, one does

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

• Adding a wildcard symbol may retrieve word variants: technologies _ formulacion de does cross communication barriers eu developpement de afrique.*.