Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement urban » development urban, developpement rural, developpement durable
information need » information needs, information needed, information speed
au developpement » du developpement, de developpement, le developpement
urban africa » urban area
need some » need scope, need more, need one
a au » a auf, a bau, a aus

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information need some personal communication a au developpement urban africa.*.