Perhaps you should try some spelling variations:
waren communication » aware communication, when communication, warning communication
communication 3.1 » communication 3.3, communication 3.2, communication 3.4
developing human » development human, developing a, developing asia
era information » a information, via information, 4a information
technology era » technology eva, technology e, technology e.g
a developing » a development
human africa » roman africa, urban africa, can africa
3 der » _ der
2 der » _ der
3.1 a » 3.1 _, 2.1 a

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technology era information ((3 der) OR (2 der)) waren communication 3.1 a developing human africa.~".
• Adding a wildcard symbol may retrieve word variants: technology era information ((3 der) OR (2 der)) waren communication 3.1 a developing human africa.*.