Perhaps you should try some spelling variations:
del developpement » de developpement, des developpements, le developpement
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
gaps information » als information, gets information, laws information
developpement de » developpement des, developpement durable
technology gaps » technology gap
de afrique » de l'afrique, en afrique, l afrique
costs del » costa del, costo del
gap rice » gap die, gap rate, gap role
rice 3.1 » rice 2.1, rice 3.3, rice 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology gaps information gap rice 3.1 communication costs del developpement de afrique.*.