Perhaps you should try some spelling variations:
classes communication » causes communication, class communication, assess communication
information content » information contents, information centers, information centre
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
developing aid » developing ai, developing asia, developing a
4 developing » 3 developing
content des » content does, contenu des, content der
des classes » des nachlasses, data classes
aid areas » arid areas, land areas, grid areas
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: technologies 2.1 information content des classes communication costs 4 developing aid areas.*.