Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
technology des » technology does, technology debts, technology nodes
infection data » infection rate, infection rates, section data
development en » developpement en, development menu, development eco
des infection » des infections, ces infections, les infections
costs social » sports social, its social, meets social
data scarce » data source, data sparse, data sources
scarce 3.1 » scale 3.1

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

• Adding a wildcard symbol may retrieve word variants: technology des infection data scarce 3.1 communications costs social development en afrique.*.