Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
get communication » et communication, debt communication, de communication
technologie 3d » technologies 3d, technologie 3, technologie und
3d information » d information, nd information, od information
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
contents 1.3 » contents 1.1, contents 2.3, contexts 1.3
cost 2.2 » costs 2.2, cost 2.4, cost 3.2

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

• Adding a wildcard symbol may retrieve word variants: technologie 3d information contents 1.3 get communication cost 2.2 developing _ africa.*.