Perhaps you should try some spelling variations:
communication modes » communication model, communication des, communication media
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
d1 developpement » de developpement, du developpement, le developpement
developpement il » developpement de, developpement et, developpement du
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
il afrique » l afrique, en afrique
trade 6.2 » trade 2.2, trade 3.2, trade 4.2
modes d1 » modes de, modes 1, modes 3.1

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 modes d1 developpement il afrique.*.