Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
calculations phase » calculations charge, calculations based, calculations chapter
development model » development models, development middle
de communication » mobile communication, online communication
technologies de » technologies _, technologies 4, technologies 2
de calculations » mde calculations, dft calculations, _ calculations
sme development » trade development
cost sme » cost some, cost side
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 de calculations phase i de communication cost sme development model afrique.*.