Perhaps you should try some spelling variations:
oral communication » personal communication
c transformation » 1 transformation, 4 transformation, e transformation
transformation 1 » transformation _, transformation a, transformation 3
technologie c » technologies 2, technologies 3, technologies 1
3 developing » 3 development
why oral » why rural, why deal
costs 3 » costs _, costs 4, costs a
2 areas » 1 areas, 2 areal, 2.1 areas
4 areas » 1 areas, 4 areal, 3.4 areas
1 why » _ 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: "technologie c transformation 1 why oral communication costs 3 developing ((2 areas) OR (4 areas)).~".
• Adding a wildcard symbol may retrieve word variants: technologie c transformation 1 why oral communication costs 3 developing ((2 areas) OR (4 areas)).*.