Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
formulation where » formulation over, formulation des, calculation where
basin development » asian development, chain development, business development
de communication » mobile communication, online communication
development en » developpement en, development menu, development eco
cost basin » cost basis, post basic, cost based
where dx » where do, where did, where _
dx de » d de, ix de, x de

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

• Adding a wildcard symbol may retrieve word variants: technologies _ formulation where dx de communication cost basin development en afrique.*.