Perhaps you should try some spelling variations:
system optimization » swarm optimization, based optimization, shape optimization
data communication » data communications
technology system » technology series, technology sector, technology set
3 developing » 3 development
developing a » developing _
based case » based care, base case, based phase
case data » cases data, base data, use data
a afrique » l afrique, en afrique
costs 3 » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology system optimization based case data communication costs 3 developing a afrique.*.