Perhaps you should try some spelling variations:
integration rules » integration roles, integration euler's, immigration rules
du developpement » de developpement, le developpement, et developpement
developpement du » developpement de, developpement des, developpement et
3 communication » 4 communication, de communication, data communication
rules rate » rules state, rules trade, rules game
du afrique » en afrique, l afrique, de l'afrique
costs du » costs _, costs 4, costs a
rate 3 » rate _, rate 4, rate a

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

• Adding a wildcard symbol may retrieve word variants: technological _ integration rules rate 3 communication costs du developpement du afrique.*.