Perhaps you should try some spelling variations:
oral communication » personal communication
trade development » software development
communication 3 » communication _, communication a
development en » developpement en, development menu, development eco
der variation » de variation, does variation, die variation
variation des » variation _, variation 6, variation series
typology der » typologie der, typologien der, typologie des
first oral » first organ, first deal, first drupal
des first » its first, his first, vs first
3 trade » 1 trade, 4 trade, 2 trade

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

• Adding a wildcard symbol may retrieve word variants: typology der variation des first oral communication 3 trade development en afrique.*.