Perhaps you should try some spelling variations:
5.2 communication » 3.2 communication, 6.2 communication, 2.2 communication
technology debts » technology debate, technology data, technology dlt
developpement en » developpement et, developpement des, developpement de
debts inflation » der inflation, does inflation, debt deflation
inflation rates » inflation rate
rates case » rates cape, states case, rates east
case 5.2 » case 4.2, case 3.2, case 2

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

• Adding a wildcard symbol may retrieve word variants: technology debts inflation rates case 5.2 communication costs _ developpement en afrique.*.