Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
communication can » communication canada, communication china, communication 3
do developpement » de developpement, du developpement, le developpement
developpement en » developpement et, developpement des, developpement de
technology 11.2 » technology 1.2, technology 11.5.2, technology 1.5.2
11.2 inflation » 10.7 inflation, 12 inflation, 3.2 inflation
price 6.2 » price 2.2, price 3.2, price 6.3.2

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

• Adding a wildcard symbol may retrieve word variants: technology 11.2 inflation _ price 6.2 communication can do developpement en afrique.*.