Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
technology price » technology rich, technology voice, technology service
developpement de » developpement des, developpement durable
inflation taxes » inflation rates, inflation tax, inflation targets
taxes case » states case, ages case, cases case
de afrique » de l'afrique, en afrique, l afrique
case 3.2 » case 4.2, case 3.1, case 5.2

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

• Adding a wildcard symbol may retrieve word variants: technology price inflation taxes case 3.2 communication costs _ developpement de afrique.*.