Perhaps you should try some spelling variations:
formulation where » formulation over, formulation des, calculation where
based development » basin development, land development, rapid development
de communication » mobile communication, online communication
development mode » development model, development models, development module
costs based » cost based, costs case, hots based
where d » where do, where _, where i
d de » d die, d der, dx 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 d de communication costs based development mode afrique.*.