Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
et communications » et communication, et communicatione, 10 communications
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
formation et » formation des, formation _
developing 1 » developing _, developing a, developing e
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
1 areas » 1 area, 2 areas, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologies _ transport network formation et communications costs 4.1 developing 1 areas.*.