Perhaps you should try some spelling variations:
tropen communication » open communication, proper communication, spoken communication
der developpement » de developpement, des developpements, leur developpement
developpement de » developpement des, developpement durable
la variation » la variacion, a variation, la validation
typology la » typology a, typology alma, typology _
variation 2 » variation 27, variation _, variation 6
der tropen » den tropen, der treppen, der open

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

• Adding a wildcard symbol may retrieve word variants: typology la variation 2 der tropen communication _ der developpement de l'afrique.*.