Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
technology 2.1.1 » technology 3.1.1, technology 2.1.2, technology 2.1.3
2.1.1 inflation » 2.3.1 inflation, 2.2.4 inflation, 5.4.1 inflation
inflation das » inflation bias, inflation tax, inflation a
development l » development li, development 1, development law
cost export » costs export, pst export, boost exports
l afrique » en afrique
das case » das coase, das cafe, das close
case 6.2 » case 6.12, case f6.2, case 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology 2.1.1 inflation das case 6.2 communication cost export development l afrique.*.