Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement durable » developpement de
does developpement » de developpement, des developpements, does development
how variation » how valuation, does variation, four variation
variation der » variation des, variation bei, variation _
typology how » typology from, typology _, typology 4.1
50s personal » 20 personal, das personal, des personal
der 50s » der 50, der 50er, over 50s

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

• Adding a wildcard symbol may retrieve word variants: typology how variation der 50s personal communication _ does developpement durable afrique.*.