Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
formulation over » formation over, formulation model, formulation where
de communication » mobile communication, online communication
land development » world development, child development
development main » development making, development moving, development mode
main afrique » en afrique
cost land » cost loans
over x » over _, over a, over 2
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 _ formulation over x de communication cost land development main afrique.*.