Perhaps you should try some spelling variations:
online communication » mobile communication, business communication, mobile communications
developpement east » development east, developpement et, developpement des
des variation » does variation, de variation, der variation
variation des » variation _, variation 6, variation series
east african » east africa, west african, west africa
theorie des » theorie der
new online » der online, des online
3 zu » 3 zur, 3 zum, 1 zu
2 zu » 2 zur, 2 zum

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: "theorie des variation des new online communication ((3 zu) OR (2 zu)) developpement east african.~".
• Adding a wildcard symbol may retrieve word variants: theorie des variation des new online communication ((3 zu) OR (2 zu)) developpement east african.*.