Perhaps you should try some spelling variations:
oral communication » personal communication
information costs » information contents, information centers, information content
technologien und » technologie und, technologien des, technologien fur
und information » fund information, road information, award information
developing east » development east, developing a, developing asia
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
costs boost » costs cost, costs boosting
boost oral » boost morale, boost local, boost social
east roman » post roman, east road
costs 4.1 » costs 4.2, costs 4.4, costs 4.3

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

• Adding a wildcard symbol may retrieve word variants: technologien und information costs boost oral communication costs 4.1 developing east roman.*.