Perhaps you should try some spelling variations:
calculations phase » calculations charge, calculations based, calculations chapter
communication cost » communication costs, communication costa, communications costs
development model » development models, development middle
de communication » mobile communication, online communication
some development » sme development, women development, site development
phase i » phase 1, phase _, phase 2
i de » i die, i der, i den

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

• Adding a wildcard symbol may retrieve word variants: technologies _ calculations phase i de communication cost some development model afrique.*.