Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
technologien energy » technology energy, technologies general
developing basic » developing asia, developing based, developing brazil
information 4 » information 2
4 developing » 3 developing
debt verbal » des verbal
basic areas » basin area, basic ideas, basic access
costs 4 » costs _, costs a, costs 4.2
4 debt » 3 debt, 4 debats

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

• Adding a wildcard symbol may retrieve word variants: technologien energy information 4 debt verbal communication costs 4 developing basic areas.*.