Perhaps you should try some spelling variations:
spatial integration » social integration, vertical integration, national integration
technology spatial » technology social, technology static, technology material
integration wage » integration wege, integration wie, integration work
developpement la » developpement de, developpement et, developpement du
4 developpement » de developpement, le developpement, et developpement
wage grade » age grade, wages trade, wage rate
la afrique » l afrique, la fabrique, en afrique
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 wage grade _ communication costs 4 developpement la afrique.*.