Perhaps you should try some spelling variations:
oral communication » personal communication
1 transformation » 4 transformation, die transformation, der transformation
technologies 1 » technologies _, technologies 4, technologies 2
3 development » 2 development
development 2 » development 1, development 2.1, development 2.3
costs 3 » costs _, costs 4, costs a
2 areas » 1 areas, 2 areal, 4 areas
3 why » _ why, 1 why
2 why » _ why, 1 why

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies 1 transformation ((3 why) OR (2 why)) oral communication costs 3 development 2 areas.~".
• Adding a wildcard symbol may retrieve word variants: technologies 1 transformation ((3 why) OR (2 why)) oral communication costs 3 development 2 areas.*.