Perhaps you should try some spelling variations:
data communication » data communications
calculation where » calculations charge, calculation source, calculations phase
der developpement » de developpement, des developpements, leur developpement
case calculation » based calculation, cost calculation, rate calculation
technology case » technology based, technology can, technology change
developpement l » developpement il, developpement la, developpement de
where does » where do
does data » does cat
l afrique » en afrique
a der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: technology case calculation where does data communication a der developpement l afrique.*.