Perhaps you should try some spelling variations:
communication mode » communication model, communication modes, communication module
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
d1 developpement » de developpement, du developpement, le developpement
developpement en » developpement et, developpement des, developpement de
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
trade 2.7 » trade 2.2, trade 2.1, trade 4.7
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 2.7 communication mode d1 developpement en afrique.*.