Perhaps you should try some spelling variations:
communication nodes » communication modes, communication model, communication des
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
add developpement » de developpement, du developpement, au developpement
inflation border » inflation der, inflation under, inflation target
technology 2.1 » technology 2.2, technology 3.1, technology 1
2.1 inflation » 2.3 inflation, 2.3.1 inflation, 2 inflation
des afrique » en afrique, de l'afrique
price 2.2 » price 2.3, price 2.4, price 3.2
nodes add » does add

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

• Adding a wildcard symbol may retrieve word variants: technology 2.1 inflation border price 2.2 communication nodes add developpement des afrique.*.