Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
technology 3.1 » technology 1, technology 2.2, technology _
3.1 election » 3.1 selection, 13.1 selection, 3.3.1 election
de afrique » de l'afrique, en afrique, l afrique
time war » time water, time aware, time work
costs 4 » costs _, costs a, costs 4.2
war de » war der, war die, war da

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

• Adding a wildcard symbol may retrieve word variants: technology 3.1 election time war de communication costs 4 developpement de afrique.*.