Perhaps you should try some spelling variations:
calculation module » calculation model, calculation source, calculation procedure
der communication » de communication, under communication, debt communication
clean development » human development, urban development
development east » development southeast, development 1
east african » east africa, west african, west africa
costs clean » costs clear
module 3 » module _, module 1, module 2
3 der » _ der, 2 der

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

• Adding a wildcard symbol may retrieve word variants: technologies _ calculation module 3 der communication costs clean development east african.*.