Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
do communication » do communications, de communication, ngo communication
technologies 2 » technologies _, technologies 4
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
information 1 » information 2, information 3, information 3.2
developing a » developing _
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
debt do » debt gdp, debt how
a areas » 1 areas, 2 areas, 4 areas
1 debt » 3 debt, 4 debt

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information 1 debt do communication cost 2.2 developing a areas.*.