Perhaps you should try some spelling variations:
communication mode » communication model, communication modes, communication module
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
d1 developpement » de developpement, du developpement, le developpement
developpement de » developpement des, developpement durable
4.1 information » 3.1 information, 2.1 information, 6.1 information
technology 4.1 » technology 3.1, technology 2.1, technology 1
model trade » modern trade, model traem, model tree
de afrique » de l'afrique, en afrique, l afrique
trade 6.2 » trade 2.2, trade 3.2, trade 4.2
mode d1 » mode de, mode 1, mode 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology 4.1 information model trade 6.2 communication mode d1 developpement de afrique.*.