Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
amy development » key development, fly development, soy development
technology 4ir » technology 4, technology 4.1, technology 4.2
development et » development east, developpement et, development eco
4ir inflation » der inflation, die inflation, aid inflation
inflation das » inflation bias, inflation tax, inflation a
et afrique » en afrique, l afrique
case data » cases data, base data, use data
costs amy » costs a
das case » das coase, das cafe, das close

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

• Adding a wildcard symbol may retrieve word variants: technology 4ir inflation das case data communications costs amy development et afrique.*.