Perhaps you should try some spelling variations:
personal communication » interpersonal communication
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
archaologie de » archaologie des, archaologie der, archaologie die
de variation » der variation, die variation, does variation
its personal » aids personal, its personnel, mtms personal
variation 6 » variation _, variations _, variation des
de afrique » de l'afrique, en afrique, l afrique
6 its » 6 it's, _ its, 2 its

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

• Adding a wildcard symbol may retrieve word variants: archaologie de variation 6 its personal communication _ le developpement de afrique.*.