Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
calculation model » calculation module, circulation model, accumulation model
basin development » asian development, chain development, business development
technologies 2 » technologies _, technologies 4
development en » developpement en, development menu, development eco
2 calculation » _ calculation, 3.2 calculation, 3.1 calculation
costs basin » cost basis
model due » model du, model deep, model d
due data » due date, age data, cge data

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 calculation model due data communications costs basin development en afrique.*.