Perhaps you should try some spelling variations:
welle communication » cell communication, people communication, called communication
technology social » technology series
social functions » social function, special functions, social sanctions
4.1 development » 3.1 development, 2.1 development, 2.3 development
functions als » functions all, functions a, functions early
vor welle » von welle
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
als vor » adels vor, als volk

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

• Adding a wildcard symbol may retrieve word variants: technology social functions als vor welle communication costs 4.1 development 1 africa.*.