Perhaps you should try some spelling variations:
immigration rules » immigration quotas, immigration law, immigration laws
5.2 communication » 3.2 communication, 6.2 communication, 2.2 communication
developpement du » developpement de, developpement des, developpement et
a developpement » au developpement, de developpement, le developpement
rules rate » rules state, rules trade, rules game
du afrique » en afrique, l afrique, de l'afrique
rate 5.2 » rates 5.2, rate 5.4, rate 4.2
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technological _ immigration rules rate 5.2 communication costs a developpement du afrique.*.