Perhaps you should try some spelling variations:
political communication » political competition
development trade » development trends, development strategy, development towards
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
4 development » 2 development, 4 developing
trade africa » trade area
costs 4 » costs _, costs a, costs 4.2
3.2 2 » 3.2 _, 3.2 a, 3.2 k

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 3.2 2 political communication costs 4 development trade africa.*.