Perhaps you should try some spelling variations:
1973 communication » 13 communication, 1.3 communication, 19 communication
developpement de » developpement des, developpement durable
inflation rates » inflation rate
technology dlt » technology data, technology debts, technology 21st
dlt inflation » der inflation, die inflation, d inflation
de afrique » de l'afrique, en afrique, l afrique
rates apo » rates cape, rates a, rates pt
apo 1973 » a 1973, avi 1973, co 1973

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 apo 1973 communication costs _ developpement de afrique.*.