Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement de » developpement des, developpement durable
variation bei » variation des, variation der, variation _
der personal » der personalen, der personen, der person
de afrique » de l'afrique, en afrique, l afrique
a des » a der, a das
a de » a die, a der, _ de

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: "typology _ variation bei der personal communication ((a de) OR (a des)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology _ variation bei der personal communication ((a de) OR (a des)) developpement de afrique.*.