Perhaps you should try some spelling variations:
de developpement » sme development
4 communication » 3 communication, 5.4 communication, de communication
retention rate » retention rates, repetition rate
technology 1 » technology _
1 retention » _ retention, 4.1 retention, n2 retention
des afrique » en afrique, de l'afrique
rate rate » rates rates, rate ratio, rate water
costs de » costs _, costs 4, costs a
rate 4 » rate _

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

• Adding a wildcard symbol may retrieve word variants: technology 1 retention rate rate 4 communication costs de developpement des afrique.*.