Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
technology german » technology germany, technology thermal, technology human
del development » model development, delta development, well development
development law » development latin, development 1
law afrique » l afrique
rate space » state space, trace space, safe space
space 3.1 » space 2.1, space 3.2, space 3.3
costs del » costa del, costo del

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

• Adding a wildcard symbol may retrieve word variants: technology german inflation rate space 3.1 communications costs del development law afrique.*.