Perhaps you should try some spelling variations:
2.3.1.1 communication » 2.2.5.4 communication, 3.4.1 communication, 6.2.4.1 communication
communication case » communications case, communication based, communication phase
de developpement » sme development
developpement de » developpement des, developpement durable
technology 3.2 » technology 2.2, technology 3.1, technology 2
3.2 inflation » 12 inflation, 2.3 inflation, 3.2 isolation
rate 2.3.1.1 » rate 2.2.2.1, rate 2.2.3.1, rate 2.3.2.4
de afrique » de l'afrique, en afrique, l afrique
rate rate » rates rates, rate ratio, rate water
case de » case des, case d, case d1

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

• Adding a wildcard symbol may retrieve word variants: technology 3.2 inflation rate rate 2.3.1.1 communication case de developpement de afrique.*.