Perhaps you should try some spelling variations:
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
technology 3.3.4 » technology 3.1.4, technology 3.3.1, technology 7.3.4
developpement de » developpement des, developpement durable
3.3.4 inflation » 3.3.3 inflation, 2.2.4 inflation, 2.3.1 inflation
inflation wages » inflation rates, inflation taxes, inflation targets
wages trade » wages race, wharves trade, states trade
de afrique » de l'afrique, en afrique, l afrique
trade 2.2 » trade 3.2, trade 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology 3.3.4 inflation wages trade 2.2 communication costs _ developpement de afrique.*.