Perhaps you should try some spelling variations:
5.2 communication » 3.2 communication, 6.2 communication, 2.2 communication
series inflation » series isolation, series information, series infromation
development lie » development life, development li, development lid
4 development » 2 development, 4 developing
inflation id » inflation i, inflation ii, inflation und
lie afrique » l afrique
case 5.2 » case 4.2, case 3.2, case 2
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 series inflation id case 5.2 communication costs 4 development lie afrique.*.