Perhaps you should try some spelling variations:
informations centers » information centers, information center, information centre
communication cost » communication costs, communication costa, communications costs
technologien als » technologien des, technologien fur, technologien und
als informations » als information, des informations, a informations
et communication » et communicatione, get communication, debt communication
economics from » economics africa, economics france
4 development » 2 development, 4 developing
centers 3 » centers _, centers a, centers 3.3
cost 4 » cost _, cost 2.4
3 et » 13 et, 3 fet, 3 set

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

• Adding a wildcard symbol may retrieve word variants: technologien als informations centers 3 et communication cost 4 development economics from.*.