Perhaps you should try some spelling variations:
information class » information classes, information case, information costs
3.2 communication » 3 communication, 2.3 communication, de communication
developing em » developing e, developing eq, developing amp
technology 2 » technology _, technology 1, technology 3
4 developing » 3 developing
class state » class share
state 3.2 » states 3.2, state 2.2, state 3.1
em africa » 1 africa
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 2 information class state 3.2 communication costs 4 developing em africa.*.