Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
developpement en » developpement et, developpement des, developpement de
technology 2.2 » technology _, technology 1, technology 3
inflation wage » inflation rate, inflation target, inflation rates
2.2 inflation » 2.3 inflation, 3.2 inflation, 2.2.4 inflation
price 3.1 » prices 3.1, rice 3.1, price 3.2

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

• Adding a wildcard symbol may retrieve word variants: technology 2.2 inflation wage price 3.1 communications costs _ developpement en afrique.*.