Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
5.3 communication » 2.3 communication, 4.3 communication, 1.3 communication
technology 4ir » technology 4, technology 4.1, technology 4.2
cs development » cns development, gas development, its development
4ir inflation » der inflation, die inflation, aid inflation
inflation use » inflation und, inflation die, inflation e
development l » development li, development 1, development law
l afrique » en afrique
case 5.3 » case 2.3, case 5.2, case 3.3
cost cs » cost lcc

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

• Adding a wildcard symbol may retrieve word variants: technology 4ir inflation use case 5.3 communication cost cs development l afrique.*.