Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement en » developpement et, developpement des, developpement de
inflation wages » inflation rates, inflation taxes, inflation targets
technology low » technology flow, technology law, technology led
low inflation » core inflation, _ inflation
wages case » ages case, wages close, cases case
case 4.1 » case 4.2, case 1

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

• Adding a wildcard symbol may retrieve word variants: technology low inflation wages case 4.1 communication costs _ developpement en afrique.*.