Perhaps you should try some spelling variations:
information state » information states, information space, information staat
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement en » developpement et, developpement des, developpement de
a developpement » au developpement, de developpement, le developpement
a information » 2 information, 1 information
technology a » technology 1, technology 3, technology 4
state trade » states trade, states traded, slave trade
trade 4.1 » trade 2.2, trade 3.2
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology a information state trade 4.1 communication costs a developpement en afrique.*.