Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement en » developpement et, developpement des, developpement de
alma variables » gamma variables, als variables, data variables
typology alma » typology a
variables 2.3 » variables _, variables 4
die personal » die personale, de personal, die persona
a du » a de, a u, _ du

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 alma variables 2.3 die personal communication ((a du) OR (a d)) developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology alma variables 2.3 die personal communication ((a du) OR (a d)) developpement en afrique.*.