Perhaps you should try some spelling variations:
f5.2 communication » 5.2 communication, 5.5.2 communication, 3.2 communication
developpement en » developpement et, developpement des, developpement de
inflation rates » inflation rate
technology dlt » technology data, technology debts, technology 21st
dlt inflation » der inflation, die inflation, d inflation
rates case » rates cape, states case, rates east
case f5.2 » case 5.2, case f6.2, case 2.5.2

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

• Adding a wildcard symbol may retrieve word variants: technology dlt inflation rates case f5.2 communication costs _ developpement en afrique.*.