Perhaps you should try some spelling variations:
spatial integration » social integration, vertical integration, national integration
technology spatial » technology social, technology static, technology material
developpement en » developpement et, developpement des, developpement de
integration age » integration wage, integration a, integration als
4 developpement » de developpement, le developpement, et developpement
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology spatial integration age grade _ communication costs 4 developpement en afrique.*.