Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
5.4 communication » de communication, data communication
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
technologies 1 » technologies _, technologies 4, technologies 2
creacion der » creacion de, creation der, creation de
barriers du » barriers d, barriers _, barriers a
1 creacion » 3 creacion, 4 creacion, y creacion
does 5.4 » does 4.8

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 creacion der does 5.4 communication barriers du developpement en afrique.*.