Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
calculation where » calculations charge, calculation source, calculations phase
based development » basin development, land development, rapid development
de communication » mobile communication, online communication
development min » development main, development menu, development may
min afrique » en afrique
cost based » iot based, forest based
where x » where _, where i, where a
x de » x die, x 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 _ calculation where x de communication cost based development min afrique.*.