Perhaps you should try some spelling variations:
oral communication » personal communication
de developpement » sme development
communication 3 » communication _, communication a
developpement l » developpement il, developpement la, developpement de
topologie 4 » topologies 4, topologie 1, topologie 2
4 variation » 2 variation, 4 validation
l afrique » en afrique
uber new » under new, uber neue, der new
uber den » uber die
3 de » 3 die, 3 der, 3 des

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "topologie 4 variation ((uber new) OR (uber den)) oral communication 3 de developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: topologie 4 variation ((uber new) OR (uber den)) oral communication 3 de developpement l afrique.*.