Perhaps you should try some spelling variations:
communication cross » communication costs
developing relief » developing region, developing regions, developing reading
de communication » mobile communication, online communication
rates developing » crises developing
technology 3.1 » technology 1, technology 2.2, technology _
relief africa » relief american
cross rates » cross ratios, cross cases, cross ratio
gap from » gaps from, map from, gdp from
from de » from dem, from deep

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

• Adding a wildcard symbol may retrieve word variants: technology 3.1 information gap from de communication cross rates developing relief africa.*.