Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
der communication » de communication, under communication, debt communication
technologies 2.1 » technologies _, technologies 4, technologies a
developing areas » developing asia, developing east, developing a
2.1 information » 3.1 information
3.2 developing » 3.3 developing, 2.2 developing, 3 developing
information 1 » information 2, information 3, information 3.2
areas trends » area trends, areas arenas, markets trends
state der » stadte der, statte der, statt der
cost 3.2 » cost 2.4
1 state » 2 state, 3 state

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information 1 state der communication cost 3.2 developing areas trends.*.