Perhaps you should try some spelling variations:
12.3 communication » 2.3 communication, 1.3 communication, 2.2.3 communication
information class » information classes, information case, information costs
developing joint » developing coping, development joint, developing ict
3.3 developing » 4 developing, 2 developing, 1 developing
technology 1 » technology _
class debate » grass debatte, class state, care debate
debate 12.3 » debates 12.3, debate 12.6, debate 12.7
costs 3.3 » costs 2.3, costs 3.5, costs 4.3

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

• Adding a wildcard symbol may retrieve word variants: technology 1 information class debate 12.3 communication costs 3.3 developing joint africa.*.