Perhaps you should try some spelling variations:
tropen communication » open communication, proper communication, spoken communication
der developpement » de developpement, des developpements, leur developpement
des l'afrique » de l'afrique, de l'amerique
2 variations » _ variations, 2 variation
variations 1 » variations 11, variations _, variations 4
typology 2 » typology _, typology 6, typology a
der tropen » den tropen, der treppen, der open
1 der » 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: typology 2 variations 1 der tropen communication _ der developpement des l'afrique.*.