Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
trade development » software development
technology e.g » technology 2.2, technology 3.1, technology 2.1
e.g simulation » 3.1 simulation, 3.2 simulation, 2.2 simulation
development de » development d, development ds, developpement de
based space » based sparse, based face, based peace
de afrique » de l'afrique, en afrique, l afrique
space 6.2 » spaces 6.2, space 3.2, space 2.2

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

• Adding a wildcard symbol may retrieve word variants: technology e.g simulation based space 6.2 communication _ trade development de afrique.*.