Perhaps you should try some spelling variations:
developing concepts » development concepts, development concept, developing countries
data communication » data communications
information class » information classes, information case, information costs
3 information » 1 information
technology 3 » technology _, technology 1, technology 4
class debate » grass debatte, class state, care debate
4 developing » 3 developing
debate data » debates data, debate saman
concepts a » concepts _, concepts 4, concepts 3
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: technology 3 information class debate data communication costs 4 developing concepts a.*.