Perhaps you should try some spelling variations:
technologies exchanging » technologies changing, technologies extending, technology changing
exchanging information » changing information, exchange information, managing information
den communication » open communication, lean communication, when communication
developing karst » developing east, developing forest, developing heart
4 developing » 3 developing
karst areas » karstic areas, forest areas, thrust areas
die den » die der, die daten
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies exchanging information _ die den communication costs 4 developing karst areas.*.