Perhaps you should try some spelling variations:
technologie trade » technology trade, technologie de, technologie transfer
trade information » price information, private information, trade integration
1.5 communication » 3.5 communication, 1.1 communication, 1.3 communication
developing cross » development cross, developing areas, development across
information u.s » information und, information use, information 1.2
4 developing » 3 developing
cross africa » across africa, across african, crises africa
u.s debate » u.s senate, 2.1 debate, 3.4 debate
debate 1.5 » debatte 1.5, debate 1.4, debate 1.6
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologie trade information u.s debate 1.5 communication costs 4 developing cross africa.*.