Perhaps you should try some spelling variations:
trade development » software development
variation 4.1.1 » variation 1.1.1, variation 4.2.1, variation 2.6.1
communication p » communication pt, communication 3, communication 1
development en » developpement en, development menu, development eco
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
4.1.1 die » 2.1.1 die, 4.1 die
die mass » die masse, die mais, die massen
p trade » up trade, 1 trade, 4 trade

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation 4.1.1 die mass communication p trade development en afrique.*.