Perhaps you should try some spelling variations:
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
developpement du » developpement de, developpement des, developpement et
technology 6 » technology _, technology 1, technology 3
6 inflation » _ inflation, 2 inflation, d inflation
du afrique » en afrique, l afrique, de l'afrique
rice 3.1 » rice 2.1, rice 3.3, rice 4.1
can leur » can learn, can lead, can let

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technology 6 inflation _ rice 3.1 communication ((can leur) OR (a leur)) developpement du afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology 6 inflation _ rice 3.1 communication ((can leur) OR (a leur)) developpement du afrique.*.